v3.26.1
Shareholder Report
 6 Months Ended
May 31, 2026
USD ($)
shares
May 31, 2026
USD ($)
shares
Shareholder Report [Line Items]    
Document Type   N-CSRS
Amendment Flag   false
Registrant Name   Horizon Funds
Entity Central Index Key   0001643174
Entity Investment Company Type   N-1A
Document Period End Date   May 31, 2026
Shareholder Report Annual or Semi-Annual   semi-annual shareholder report
Centre American Select Equity Fund | Advisor Class    
Shareholder Report [Line Items]    
Fund Name   Centre American Select Equity Fund
Class Name   Advisor Class
Trading Symbol   DHAMX
Annual or Semi-Annual Statement [Text Block]   This semi-annual shareholder report contains important information about Centre American Select Equity Fund (the "Fund") for the period of December 1, 2025 to May 31, 2026.
Additional Information [Text Block]   You can find additional information about the Fund at https://www.horizonmutualfunds.com/case-fund. You can also request this information by contacting us at 1-855-754-7932.
Additional Information Phone Number   1-855-754-7932
Additional Information Website   https://www.horizonmutualfunds.com/case-fund
Expenses [Text Block]  
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class Costs of a $10,000 Investment Costs Paid as a Percentage of a $10,000 Investment
Advisor Class $63 1.11%
Expenses Paid, Amount   $ 63
Expense Ratio, Percent   1.11%
Net Assets $ 471,086,896 $ 471,086,896
Holdings Count | shares 48 48
Investment Company, Portfolio Turnover   78.00%
Additional Fund Statistics [Text Block]  
What are some key Fund statistics?
(as of May 31, 2026)
Net Assets ($) $471,086,896
Number of Portfolio Holdings 48
Portfolio Turnover Rate (%) 78%
Holdings [Text Block]  
What did the Fund invest in?
(as of May 31, 2026)
Portfolio Composition
Sector Breakdown % of Net Assets
Information Technology 34.9%
Industrials 21.7%
Materials 16.4%
Financials 11.6%
Energy 6.7%
Real Estate 4.1%
Health Care 3.5%
Consumer Staples 0.9%
Communication Services 0.8%
Cash & Other -0.6%
Top Holdings % of Net Assets
NVIDIA Corp. 7.9%
Apple, Inc. 7.2%
Nucor Corp. 3.3%
Broadcom, Inc. 3.3%
Microchip Technology, Inc. 3.0%
Newmont Goldcorp Corp. 2.7%
Air Products & Chemicals, Inc. 2.5%
Antero Resources Corp. 2.5%
Analog Devices, Inc. 2.5%
Rockwell Automation, Inc. 2.5%
Largest Holdings [Text Block]  
Top Holdings % of Net Assets
NVIDIA Corp. 7.9%
Apple, Inc. 7.2%
Nucor Corp. 3.3%
Broadcom, Inc. 3.3%
Microchip Technology, Inc. 3.0%
Newmont Goldcorp Corp. 2.7%
Air Products & Chemicals, Inc. 2.5%
Antero Resources Corp. 2.5%
Analog Devices, Inc. 2.5%
Rockwell Automation, Inc. 2.5%
Centre American Select Equity Fund | Investor Class    
Shareholder Report [Line Items]    
Fund Name   Centre American Select Equity Fund
Class Name   Investor Class
Trading Symbol   DHANX
Annual or Semi-Annual Statement [Text Block]   This semi-annual shareholder report contains important information about Centre American Select Equity Fund (the "Fund") for the period of December 1, 2025 to May 31, 2026.
Additional Information [Text Block]   You can find additional information about the Fund at https://www.horizonmutualfunds.com/case-fund. You can also request this information by contacting us at 1-855-754-7932.
Additional Information Phone Number   1-855-754-7932
Additional Information Website   https://www.horizonmutualfunds.com/case-fund
Expenses [Text Block]  
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class Costs of a $10,000 Investment Costs Paid as a Percentage of a $10,000 Investment
Investor Class $54 0.96%
Expenses Paid, Amount   $ 54
Expense Ratio, Percent   0.96%
Net Assets $ 471,086,896 $ 471,086,896
Holdings Count | shares 48 48
Investment Company, Portfolio Turnover   78.00%
Additional Fund Statistics [Text Block]  
What are some key Fund statistics?
(as of May 31, 2026)
Net Assets ($) $471,086,896
Number of Portfolio Holdings 48
Portfolio Turnover Rate (%) 78%
Holdings [Text Block]  
What did the Fund invest in?
(as of May 31, 2026)
Portfolio Composition
Sector Breakdown % of Net Assets
Information Technology 34.9%
Industrials 21.7%
Materials 16.4%
Financials 11.6%
Energy 6.7%
Real Estate 4.1%
Health Care 3.5%
Consumer Staples 0.9%
Communication Services 0.8%
Cash & Other -0.6%
Top Holdings % of Net Assets
NVIDIA Corp. 7.9%
Apple, Inc. 7.2%
Nucor Corp. 3.3%
Broadcom, Inc. 3.3%
Microchip Technology, Inc. 3.0%
Newmont Goldcorp Corp. 2.7%
Air Products & Chemicals, Inc. 2.5%
Antero Resources Corp. 2.5%
Analog Devices, Inc. 2.5%
Rockwell Automation, Inc. 2.5%
Largest Holdings [Text Block]  
Top Holdings % of Net Assets
NVIDIA Corp. 7.9%
Apple, Inc. 7.2%
Nucor Corp. 3.3%
Broadcom, Inc. 3.3%
Microchip Technology, Inc. 3.0%
Newmont Goldcorp Corp. 2.7%
Air Products & Chemicals, Inc. 2.5%
Antero Resources Corp. 2.5%
Analog Devices, Inc. 2.5%
Rockwell Automation, Inc. 2.5%
Centre Global Infrastructure Fund | Advisor Class    
Shareholder Report [Line Items]    
Fund Name   Centre Global Infrastructure Fund
Class Name   Advisor Class
Trading Symbol   DHIVX
Annual or Semi-Annual Statement [Text Block]   This semi-annual shareholder report contains important information about Centre Global Infrastructure Fund (the "Fund") for the period of December 1, 2025 to May 31, 2026.
Additional Information [Text Block]   You can find additional information about the Fund at https://www.horizonmutualfunds.com/cgi-fund. You can also request this information by contacting us at 1-855-754-7932.
Additional Information Phone Number   1-855-754-7932
Additional Information Website   https://www.horizonmutualfunds.com/cgi-fund
Expenses [Text Block]  
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class Costs of a $10,000 Investment Costs Paid as a Percentage of a $10,000 Investment
Advisor Class $68 1.30%
Expenses Paid, Amount   $ 68
Expense Ratio, Percent   1.30%
Net Assets $ 84,749,547 $ 84,749,547
Holdings Count | shares 51 51
Investment Company, Portfolio Turnover   7.00%
Additional Fund Statistics [Text Block]  
What are some key Fund statistics?
(as of May 31, 2026)
Net Assets ($) $84,749,547
Number of Portfolio Holdings 51
Portfolio Turnover Rate (%) 7%
Holdings [Text Block]  
What did the Fund invest in?
(as of May 31, 2026)
Portfolio Composition
Industry Breakdown % of Net Assets
Oil, Gas & Consumable Fuels 26.5%
Diversified Telecommunication Services 21.5%
Electric Utilities 16.0%
Wireless Telecommunication Services 12.0%
Multi-Utilities 8.8%
Electrical Equipment 6.7%
Transportation Infrastructure 3.3%
Health Care Providers & Services 3.2%
Cash & Other 2.0%
Top Holdings % of Net Assets
Enbridge, Inc. 6.1%
Verizon Communications, Inc. 5.6%
SoftBank Group Corp. 5.2%
AT&T, Inc. 4.9%
Williams Cos., Inc. 4.4%
Deutsche Telekom AG 3.6%
TC Energy Corp. 3.5%
HCA Healthcare, Inc. 3.2%
Kinder Morgan, Inc. 3.1%
NextEra Energy, Inc. 2.8%
Geographic Breakdown % of Net Assets
United States 52.4%
Canada 13.0%
Japan 9.0%
Germany 4.5%
France 4.3%
Spain 4.0%
United Kingdom 3.1%
Switzerland 3.1%
Australia 1.9%
Cash & Other 4.7%
Largest Holdings [Text Block]  
Top Holdings % of Net Assets
Enbridge, Inc. 6.1%
Verizon Communications, Inc. 5.6%
SoftBank Group Corp. 5.2%
AT&T, Inc. 4.9%
Williams Cos., Inc. 4.4%
Deutsche Telekom AG 3.6%
TC Energy Corp. 3.5%
HCA Healthcare, Inc. 3.2%
Kinder Morgan, Inc. 3.1%
NextEra Energy, Inc. 2.8%
Centre Global Infrastructure Fund | Investor Class    
Shareholder Report [Line Items]    
Fund Name   Centre Global Infrastructure Fund
Class Name   Investor Class
Trading Symbol   DHINX
Annual or Semi-Annual Statement [Text Block]   This semi-annual shareholder report contains important information about Centre Global Infrastructure Fund (the "Fund") for the period of December 1, 2025 to May 31, 2026.
Additional Information [Text Block]   You can find additional information about the Fund at https://www.horizonmutualfunds.com/cgi-fund. You can also request this information by contacting us at 1-855-754-7932.
Additional Information Phone Number   1-855-754-7932
Additional Information Website   https://www.horizonmutualfunds.com/cgi-fund
Expenses [Text Block]  
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class Costs of a $10,000 Investment Costs Paid as a Percentage of a $10,000 Investment
Investor Class $60 1.15%
Expenses Paid, Amount   $ 60
Expense Ratio, Percent   1.15%
Net Assets $ 84,749,547 $ 84,749,547
Holdings Count | shares 51 51
Investment Company, Portfolio Turnover   7.00%
Additional Fund Statistics [Text Block]  
What are some key Fund statistics?
(as of May 31, 2026)
Net Assets ($) $84,749,547
Number of Portfolio Holdings 51
Portfolio Turnover Rate (%) 7%
Holdings [Text Block]  
What did the Fund invest in?
(as of May 31, 2026)
Portfolio Composition
Industry Breakdown % of Net Assets
Oil, Gas & Consumable Fuels 26.5%
Diversified Telecommunication Services 21.5%
Electric Utilities 16.0%
Wireless Telecommunication Services 12.0%
Multi-Utilities 8.8%
Electrical Equipment 6.7%
Transportation Infrastructure 3.3%
Health Care Providers & Services 3.2%
Cash & Other 2.0%
Top Holdings % of Net Assets
Enbridge, Inc. 6.1%
Verizon Communications, Inc. 5.6%
SoftBank Group Corp. 5.2%
AT&T, Inc. 4.9%
Williams Cos., Inc. 4.4%
Deutsche Telekom AG 3.6%
TC Energy Corp. 3.5%
HCA Healthcare, Inc. 3.2%
Kinder Morgan, Inc. 3.1%
NextEra Energy, Inc. 2.8%
Geographic Breakdown % of Net Assets
United States 52.4%
Canada 13.0%
Japan 9.0%
Germany 4.5%
France 4.3%
Spain 4.0%
United Kingdom 3.1%
Switzerland 3.1%
Australia 1.9%
Cash & Other 4.7%
Largest Holdings [Text Block]  
Top Holdings % of Net Assets
Enbridge, Inc. 6.1%
Verizon Communications, Inc. 5.6%
SoftBank Group Corp. 5.2%
AT&T, Inc. 4.9%
Williams Cos., Inc. 4.4%
Deutsche Telekom AG 3.6%
TC Energy Corp. 3.5%
HCA Healthcare, Inc. 3.2%
Kinder Morgan, Inc. 3.1%
NextEra Energy, Inc. 2.8%
Horizon Active Asset Allocation Fund | Investor Class    
Shareholder Report [Line Items]    
Fund Name   Horizon Active Asset Allocation Fund
Class Name   Investor Class
Trading Symbol   AAANX
Annual or Semi-Annual Statement [Text Block]   This semi-annual shareholder report contains important information about Horizon Active Asset Allocation Fund (the "Fund") for the period of December 1, 2025 to May 31, 2026.
Additional Information [Text Block]   You can find additional information about the Fund at https://www.horizonmutualfunds.com/aaa-fund. You can also request this information by contacting us at 1-855-754-7932.
Additional Information Phone Number   1-855-754-7932
Additional Information Website   https://www.horizonmutualfunds.com/aaa-fund
Expenses [Text Block]  
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class Costs of a $10,000 Investment Costs Paid as a Percentage of a $10,000 Investment
Investor Class $62 1.16%
Expenses Paid, Amount   $ 62
Expense Ratio, Percent   1.16%
Net Assets $ 781,532,338 $ 781,532,338
Holdings Count | shares 86 86
Investment Company, Portfolio Turnover   36.00%
Additional Fund Statistics [Text Block]  
What are some key Fund statistics?
(as of May 31, 2026)
Net Assets ($) $781,532,338
Number of Portfolio Holdings 86
Portfolio Turnover Rate (%) 36%
Holdings [Text Block]  
What did the Fund invest in?
(as of May 31, 2026)
Portfolio Composition
Sector Breakdown % of Net Assets
Information Technology 10.4%
Communication Services 2.4%
Consumer Discretionary 2.2%
Industrials 1.9%
Materials 0.7%
Health Care 0.5%
Consumer Staples 0.4%
Financials 0.3%
Utilities 0.1%
Cash & Other 81.1%
Geographic Breakdown % of Net Assets
United States 114.1%
Japan 0.4%
Canada 0.3%
China 0.3%
Taiwan 0.2%
Germany 0.1%
Hong Kong 0.1%
Australia 0.1%
Netherlands 0.1%
Cash & Other -15.7%
Type of Security % of Net Assets
Exchange Traded Funds 81.1%
Common Stocks 19.0%
Investments Purchased with Proceeds from Securities Lending 15.9%
Money Market Funds 0.1%
Purchased Options 0.1%
Written Options -0.1%
Cash & Other -16.1%
Horizon Active Asset Allocation Fund | Advisor Class    
Shareholder Report [Line Items]    
Fund Name   Horizon Active Asset Allocation Fund
Class Name   Advisor Class
Trading Symbol   HASAX
Annual or Semi-Annual Statement [Text Block]   This semi-annual shareholder report contains important information about Horizon Active Asset Allocation Fund (the "Fund") for the period of December 1, 2025 to May 31, 2026.
Additional Information [Text Block]   You can find additional information about the Fund at https://www.horizonmutualfunds.com/aaa-fund. You can also request this information by contacting us at 1-855-754-7932.
Additional Information Phone Number   1-855-754-7932
Additional Information Website   https://www.horizonmutualfunds.com/aaa-fund
Expenses [Text Block]  
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class Costs of a $10,000 Investment Costs Paid as a Percentage of a $10,000 Investment
Advisor Class $70 1.31%
Expenses Paid, Amount   $ 70
Expense Ratio, Percent   1.31%
Net Assets $ 781,532,338 $ 781,532,338
Holdings Count | shares 86 86
Investment Company, Portfolio Turnover   36.00%
Additional Fund Statistics [Text Block]  
What are some key Fund statistics?
(as of May 31, 2026)
Net Assets ($) $781,532,338
Number of Portfolio Holdings 86
Portfolio Turnover Rate (%) 36%
Holdings [Text Block]  
What did the Fund invest in?
(as of May 31, 2026)
Portfolio Composition
Sector Breakdown % of Net Assets
Information Technology 10.4%
Communication Services 2.4%
Consumer Discretionary 2.2%
Industrials 1.9%
Materials 0.7%
Health Care 0.5%
Consumer Staples 0.4%
Financials 0.3%
Utilities 0.1%
Cash & Other 81.1%
Geographic Breakdown % of Net Assets
United States 114.1%
Japan 0.4%
Canada 0.3%
China 0.3%
Taiwan 0.2%
Germany 0.1%
Hong Kong 0.1%
Australia 0.1%
Netherlands 0.1%
Cash & Other -15.7%
Type of Security % of Net Assets
Exchange Traded Funds 81.1%
Common Stocks 19.0%
Investments Purchased with Proceeds from Securities Lending 15.9%
Money Market Funds 0.1%
Purchased Options 0.1%
Written Options -0.1%
Cash & Other -16.1%
Horizon Active Asset Allocation Fund | Institutional Class    
Shareholder Report [Line Items]    
Fund Name   Horizon Active Asset Allocation Fund
Class Name   Institutional Class
Trading Symbol   HASIX
Annual or Semi-Annual Statement [Text Block]   This semi-annual shareholder report contains important information about Horizon Active Asset Allocation Fund (the "Fund") for the period of December 1, 2025 to May 31, 2026.
Additional Information [Text Block]   You can find additional information about the Fund at https://www.horizonmutualfunds.com/aaa-fund. You can also request this information by contacting us at 1-855-754-7932.
Additional Information Phone Number   1-855-754-7932
Additional Information Website   https://www.horizonmutualfunds.com/aaa-fund
Expenses [Text Block]  
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class Costs of a $10,000 Investment Costs Paid as a Percentage of a $10,000 Investment
Institutional Class $56 1.06%
Expenses Paid, Amount   $ 56
Expense Ratio, Percent   1.06%
Net Assets $ 781,532,338 $ 781,532,338
Holdings Count | shares 86 86
Investment Company, Portfolio Turnover   36.00%
Additional Fund Statistics [Text Block]  
What are some key Fund statistics?
(as of May 31, 2026)
Net Assets ($) $781,532,338
Number of Portfolio Holdings 86
Portfolio Turnover Rate (%) 36%
Holdings [Text Block]  
What did the Fund invest in?
(as of May 31, 2026)
Portfolio Composition
Sector Breakdown % of Net Assets
Information Technology 10.4%
Communication Services 2.4%
Consumer Discretionary 2.2%
Industrials 1.9%
Materials 0.7%
Health Care 0.5%
Consumer Staples 0.4%
Financials 0.3%
Utilities 0.1%
Cash & Other 81.1%
Geographic Breakdown % of Net Assets
United States 114.1%
Japan 0.4%
Canada 0.3%
China 0.3%
Taiwan 0.2%
Germany 0.1%
Hong Kong 0.1%
Australia 0.1%
Netherlands 0.1%
Cash & Other -15.7%
Type of Security % of Net Assets
Exchange Traded Funds 81.1%
Common Stocks 19.0%
Investments Purchased with Proceeds from Securities Lending 15.9%
Money Market Funds 0.1%
Purchased Options 0.1%
Written Options -0.1%
Cash & Other -16.1%
Horizon Active Income Fund | Investor Class    
Shareholder Report [Line Items]    
Fund Name   Horizon Active Income Fund
Class Name   Investor Class
Trading Symbol   AIMNX
Annual or Semi-Annual Statement [Text Block]   This semi-annual shareholder report contains important information about Horizon Active Income Fund (the "Fund") for the period of December 1, 2025 to May 31, 2026.
Additional Information [Text Block]   You can find additional information about the Fund at https://www.horizonmutualfunds.com/aim-fund. You can also request this information by contacting us at 1-855-754-7932.
Additional Information Phone Number   1-855-754-7932
Additional Information Website   https://www.horizonmutualfunds.com/aim-fund
Expenses [Text Block]  
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class Costs of a $10,000 Investment Costs Paid as a Percentage of a $10,000 Investment
Investor Class $47 0.94%
Expenses Paid, Amount   $ 47
Expense Ratio, Percent   0.94%
Net Assets $ 291,154,092 $ 291,154,092
Holdings Count | shares 12 12
Investment Company, Portfolio Turnover   20.00%
Additional Fund Statistics [Text Block]  
What are some key Fund statistics?
(as of May 31, 2026)
Net Assets ($) $291,154,092
Number of Portfolio Holdings 12
Portfolio Turnover Rate (%) 20%
Holdings [Text Block]  
What did the Fund invest in?
(as of May 31, 2026)
Portfolio Composition
Type of Security % of Net Assets
Exchange Traded Funds 99.8%
Investments Purchased with Proceeds from Securities Lending 3.0%
Money Market Funds 0.4%
Cash & Other -3.2%
Horizon Active Income Fund | Advisor Class    
Shareholder Report [Line Items]    
Fund Name   Horizon Active Income Fund
Class Name   Advisor Class
Trading Symbol   AIHAX
Annual or Semi-Annual Statement [Text Block]   This semi-annual shareholder report contains important information about Horizon Active Income Fund (the "Fund") for the period of December 1, 2025 to May 31, 2026.
Additional Information [Text Block]   You can find additional information about the Fund at https://www.horizonmutualfunds.com/aim-fund. You can also request this information by contacting us at 1-855-754-7932.
Additional Information Phone Number   1-855-754-7932
Additional Information Website   https://www.horizonmutualfunds.com/aim-fund
Expenses [Text Block]  
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class Costs of a $10,000 Investment Costs Paid as a Percentage of a $10,000 Investment
Advisor Class $55 1.10%
Expenses Paid, Amount   $ 55
Expense Ratio, Percent   1.10%
Net Assets $ 291,154,092 $ 291,154,092
Holdings Count | shares 12 12
Investment Company, Portfolio Turnover   20.00%
Additional Fund Statistics [Text Block]  
What are some key Fund statistics?
(as of May 31, 2026)
Net Assets ($) $291,154,092
Number of Portfolio Holdings 12
Portfolio Turnover Rate (%) 20%
Holdings [Text Block]  
What did the Fund invest in?
(as of May 31, 2026)
Portfolio Composition
Type of Security % of Net Assets
Exchange Traded Funds 99.8%
Investments Purchased with Proceeds from Securities Lending 3.0%
Money Market Funds 0.4%
Cash & Other -3.2%
Horizon Active Income Fund | Institutional Class    
Shareholder Report [Line Items]    
Fund Name   Horizon Active Income Fund
Class Name   Institutional Class
Trading Symbol   AIRIX
Annual or Semi-Annual Statement [Text Block]   This semi-annual shareholder report contains important information about Horizon Active Income Fund (the "Fund") for the period of December 1, 2025 to May 31, 2026.
Additional Information [Text Block]   You can find additional information about the Fund at https://www.horizonmutualfunds.com/aim-fund. You can also request this information by contacting us at 1-855-754-7932.
Additional Information Phone Number   1-855-754-7932
Additional Information Website   https://www.horizonmutualfunds.com/aim-fund
Expenses [Text Block]  
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class Costs of a $10,000 Investment Costs Paid as a Percentage of a $10,000 Investment
Institutional Class $42 0.84%
Expenses Paid, Amount   $ 42
Expense Ratio, Percent   0.84%
Net Assets $ 291,154,092 $ 291,154,092
Holdings Count | shares 12 12
Investment Company, Portfolio Turnover   20.00%
Additional Fund Statistics [Text Block]  
What are some key Fund statistics?
(as of May 31, 2026)
Net Assets ($) $291,154,092
Number of Portfolio Holdings 12
Portfolio Turnover Rate (%) 20%
Holdings [Text Block]  
What did the Fund invest in?
(as of May 31, 2026)
Portfolio Composition
Type of Security % of Net Assets
Exchange Traded Funds 99.8%
Investments Purchased with Proceeds from Securities Lending 3.0%
Money Market Funds 0.4%
Cash & Other -3.2%
Horizon Active Risk Assist Fund | Investor Class    
Shareholder Report [Line Items]    
Fund Name   Horizon Active Risk Assist Fund
Class Name   Investor Class
Trading Symbol   ARANX
Annual or Semi-Annual Statement [Text Block]   This semi-annual shareholder report contains important information about Horizon Active Risk Assist Fund (the "Fund") for the period of December 1, 2025 to May 31, 2026.
Additional Information [Text Block]   You can find additional information about the Fund at https://www.horizonmutualfunds.com/ara-fund. You can also request this information by contacting us at 1-855-754-7932.
Additional Information Phone Number   1-855-754-7932
Additional Information Website   https://www.horizonmutualfunds.com/ara-fund
Expenses [Text Block]  
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class Costs of a $10,000 Investment Costs Paid as a Percentage of a $10,000 Investment
Investor Class $61 1.16%
Expenses Paid, Amount   $ 61
Expense Ratio, Percent   1.16%
Net Assets $ 1,597,025,378 $ 1,597,025,378
Holdings Count | shares 121 121
Investment Company, Portfolio Turnover   21.00%
Additional Fund Statistics [Text Block]  
What are some key Fund statistics?
(as of May 31, 2026)
Net Assets ($) $1,597,025,378
Number of Portfolio Holdings 121
Portfolio Turnover Rate (%) 21%
Holdings [Text Block]  
What did the Fund invest in?
(as of May 31, 2026)
Portfolio Composition
Sector Breakdown % of Net Assets
Information Technology 7.4%
Communication Services 1.7%
Consumer Discretionary 1.5%
Industrials 1.4%
Materials 0.5%
Health Care 0.4%
Consumer Staples 0.3%
Financials 0.2%
Finance and Insurance 0.1%
Cash & Other 86.5%
Geographic Breakdown % of Net Assets
United States 99.6%
Japan 0.3%
China 0.2%
Canada 0.1%
Taiwan 0.1%
Germany 0.1%
Hong Kong 0.1%
Australia 0.1%
Netherlands 0.1%
Cash & Other -0.7%
Type of Security % of Net Assets
Exchange Traded Funds 85.7%
Common Stocks 13.6%
Investments Purchased with Proceeds from Securities Lending 0.8%
Purchased Options 0.7%
Money Market Funds 0.6%
Written Options -0.3%
Cash & Other -1.1%
Horizon Active Risk Assist Fund | Advisor Class    
Shareholder Report [Line Items]    
Fund Name   Horizon Active Risk Assist Fund
Class Name   Advisor Class
Trading Symbol   ARAAX
Annual or Semi-Annual Statement [Text Block]   This semi-annual shareholder report contains important information about Horizon Active Risk Assist Fund (the "Fund") for the period of December 1, 2025 to May 31, 2026.
Additional Information [Text Block]   You can find additional information about the Fund at https://www.horizonmutualfunds.com/ara-fund. You can also request this information by contacting us at 1-855-754-7932.
Additional Information Phone Number   1-855-754-7932
Additional Information Website   https://www.horizonmutualfunds.com/ara-fund
Expenses [Text Block]  
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class Costs of a $10,000 Investment Costs Paid as a Percentage of a $10,000 Investment
Advisor Class $69 1.31%
Expenses Paid, Amount   $ 69
Expense Ratio, Percent   1.31%
Net Assets $ 1,597,025,378 $ 1,597,025,378
Holdings Count | shares 121 121
Investment Company, Portfolio Turnover   21.00%
Additional Fund Statistics [Text Block]  
What are some key Fund statistics?
(as of May 31, 2026)
Net Assets ($) $1,597,025,378
Number of Portfolio Holdings 121
Portfolio Turnover Rate (%) 21%
Holdings [Text Block]  
What did the Fund invest in?
(as of May 31, 2026)
Portfolio Composition
Sector Breakdown % of Net Assets
Information Technology 7.4%
Communication Services 1.7%
Consumer Discretionary 1.5%
Industrials 1.4%
Materials 0.5%
Health Care 0.4%
Consumer Staples 0.3%
Financials 0.2%
Finance and Insurance 0.1%
Cash & Other 86.5%
Geographic Breakdown % of Net Assets
United States 99.6%
Japan 0.3%
China 0.2%
Canada 0.1%
Taiwan 0.1%
Germany 0.1%
Hong Kong 0.1%
Australia 0.1%
Netherlands 0.1%
Cash & Other -0.7%
Type of Security % of Net Assets
Exchange Traded Funds 85.7%
Common Stocks 13.6%
Investments Purchased with Proceeds from Securities Lending 0.8%
Purchased Options 0.7%
Money Market Funds 0.6%
Written Options -0.3%
Cash & Other -1.1%
Horizon Active Risk Assist Fund | Institutional Class    
Shareholder Report [Line Items]    
Fund Name   Horizon Active Risk Assist Fund
Class Name   Institutional Class
Trading Symbol   ACRIX
Annual or Semi-Annual Statement [Text Block]   This semi-annual shareholder report contains important information about Horizon Active Risk Assist Fund (the "Fund") for the period of December 1, 2025 to May 31, 2026.
Additional Information [Text Block]   You can find additional information about the Fund at https://www.horizonmutualfunds.com/ara-fund. You can also request this information by contacting us at 1-855-754-7932.
Additional Information Phone Number   1-855-754-7932
Additional Information Website   https://www.horizonmutualfunds.com/ara-fund
Expenses [Text Block]  
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class Costs of a $10,000 Investment Costs Paid as a Percentage of a $10,000 Investment
Institutional Class $56 1.06%
Expenses Paid, Amount   $ 56
Expense Ratio, Percent   1.06%
Net Assets $ 1,597,025,378 $ 1,597,025,378
Holdings Count | shares 121 121
Investment Company, Portfolio Turnover   21.00%
Additional Fund Statistics [Text Block]  
What are some key Fund statistics?
(as of May 31, 2026)
Net Assets ($) $1,597,025,378
Number of Portfolio Holdings 121
Portfolio Turnover Rate (%) 21%
Holdings [Text Block]  
What did the Fund invest in?
(as of May 31, 2026)
Portfolio Composition
Sector Breakdown % of Net Assets
Information Technology 7.4%
Communication Services 1.7%
Consumer Discretionary 1.5%
Industrials 1.4%
Materials 0.5%
Health Care 0.4%
Consumer Staples 0.3%
Financials 0.2%
Finance and Insurance 0.1%
Cash & Other 86.5%
Geographic Breakdown % of Net Assets
United States 99.6%
Japan 0.3%
China 0.2%
Canada 0.1%
Taiwan 0.1%
Germany 0.1%
Hong Kong 0.1%
Australia 0.1%
Netherlands 0.1%
Cash & Other -0.7%
Type of Security % of Net Assets
Exchange Traded Funds 85.7%
Common Stocks 13.6%
Investments Purchased with Proceeds from Securities Lending 0.8%
Purchased Options 0.7%
Money Market Funds 0.6%
Written Options -0.3%
Cash & Other -1.1%
Horizon Defensive Core Fund | Investor Class    
Shareholder Report [Line Items]    
Fund Name   Horizon Defensive Core Fund
Class Name   Investor Class
Trading Symbol   HESGX
Annual or Semi-Annual Statement [Text Block]   This semi-annual shareholder report contains important information about Horizon Defensive Core Fund (the "Fund") for the period of December 1, 2025 to May 31, 2026.
Additional Information [Text Block]   You can find additional information about the Fund at https://www.horizonmutualfunds.com/defc-fund. You can also request this information by contacting us at 1-855-754-7932.
Additional Information Phone Number   1-855-754-7932
Additional Information Website   https://www.horizonmutualfunds.com/defc-fund
Expenses [Text Block]  
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class Costs of a $10,000 Investment Costs Paid as a Percentage of a $10,000 Investment
Investor Class $47 0.91%
Expenses Paid, Amount   $ 47
Expense Ratio, Percent   0.91%
Material Change Date   May 15, 2026
Net Assets $ 530,762,674 $ 530,762,674
Holdings Count | shares 300 300
Investment Company, Portfolio Turnover   7.00%
Additional Fund Statistics [Text Block]  
What are some key Fund statistics?
(as of May 31, 2026)
Net Assets ($) $530,762,674
Number of Portfolio Holdings 300
Portfolio Turnover Rate (%) 7%
Holdings [Text Block]  
What did the Fund invest in?
(as of May 31, 2026)
Portfolio Composition
Sector Breakdown % of Net Assets
Information Technology 34.2%
Financials 9.1%
Communication Services 8.9%
Consumer Discretionary 8.7%
Health Care 8.2%
Industrials 6.2%
Consumer Staples 6.1%
Energy 3.3%
Utilities 2.6%
Cash & Other 12.7%
Type of Security % of Net Assets
Common Stocks 89.4%
Exchange Traded Funds 8.8%
Real Estate Investment Trusts 1.6%
Money Market Funds 0.2%
Cash & Other 0.0%
Material Fund Change [Text Block]  
How has the Fund changed over the past year?

On May 15, 2026, the Fund filed an amendment to its registration statement (which became effective on July 10, 2026) to allow the Fund to use options as a part of its principal investment strategy.
Material Fund Change Strategies [Text Block]   On May 15, 2026, the Fund filed an amendment to its registration statement (which became effective on July 10, 2026) to allow the Fund to use options as a part of its principal investment strategy.
Horizon Defensive Core Fund | Advisor Class    
Shareholder Report [Line Items]    
Fund Name   Horizon Defensive Core Fund
Class Name   Advisor Class
Trading Symbol   HESAX
Annual or Semi-Annual Statement [Text Block]   This semi-annual shareholder report contains important information about Horizon Defensive Core Fund (the "Fund") for the period of December 1, 2025 to May 31, 2026.
Additional Information [Text Block]   You can find additional information about the Fund at https://www.horizonmutualfunds.com/defc-fund. You can also request this information by contacting us at 1-855-754-7932.
Additional Information Phone Number   1-855-754-7932
Additional Information Website   https://www.horizonmutualfunds.com/defc-fund
Expenses [Text Block]  
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class Costs of a $10,000 Investment Costs Paid as a Percentage of a $10,000 Investment
Advisor Class $55 1.06%
Expenses Paid, Amount   $ 55
Expense Ratio, Percent   1.06%
Material Change Date   May 15, 2026
Net Assets $ 530,762,674 $ 530,762,674
Holdings Count | shares 300 300
Investment Company, Portfolio Turnover   7.00%
Additional Fund Statistics [Text Block]  
What are some key Fund statistics?
(as of May 31, 2026)
Net Assets ($) $530,762,674
Number of Portfolio Holdings 300
Portfolio Turnover Rate (%) 7%
Holdings [Text Block]  
What did the Fund invest in?
(as of May 31, 2026)
Portfolio Composition
Sector Breakdown % of Net Assets
Information Technology 34.2%
Financials 9.1%
Communication Services 8.9%
Consumer Discretionary 8.7%
Health Care 8.2%
Industrials 6.2%
Consumer Staples 6.1%
Energy 3.3%
Utilities 2.6%
Cash & Other 12.7%
Type of Security % of Net Assets
Common Stocks 89.4%
Exchange Traded Funds 8.8%
Real Estate Investment Trusts 1.6%
Money Market Funds 0.2%
Cash & Other 0.0%
Material Fund Change [Text Block]  
How has the Fund changed over the past year?

On May 15, 2026, the Fund filed an amendment to its registration statement (which became effective on July 10, 2026) to allow the Fund to use options as a part of its principal investment strategy.
Material Fund Change Strategies [Text Block]   On May 15, 2026, the Fund filed an amendment to its registration statement (which became effective on July 10, 2026) to allow the Fund to use options as a part of its principal investment strategy.
Horizon Defined Risk Fund | Investor Class    
Shareholder Report [Line Items]    
Fund Name   Horizon Defined Risk Fund
Class Name   Investor Class
Trading Symbol   HNDRX
Annual or Semi-Annual Statement [Text Block]   This semi-annual shareholder report contains important information about Horizon Defined Risk Fund (the "Fund") for the period of December 1, 2025 to May 31, 2026.
Additional Information [Text Block]   You can find additional information about the Fund at https://www.horizonmutualfunds.com/def-fund. You can also request this information by contacting us at 1-855-754-7932.
Additional Information Phone Number   1-855-754-7932
Additional Information Website   https://www.horizonmutualfunds.com/def-fund
Expenses [Text Block]  
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class Costs of a $10,000 Investment Costs Paid as a Percentage of a $10,000 Investment
Investor Class $51 1.00%
Expenses Paid, Amount   $ 51
Expense Ratio, Percent   1.00%
Net Assets $ 1,065,109,109 $ 1,065,109,109
Holdings Count | shares 518 518
Investment Company, Portfolio Turnover   1.00%
Additional Fund Statistics [Text Block]  
What are some key Fund statistics?
(as of May 31, 2026)
Net Assets ($) $1,065,109,109
Number of Portfolio Holdings 518
Portfolio Turnover Rate (%) 1%
Holdings [Text Block]  
What did the Fund invest in?
(as of May 31, 2026)
Portfolio Composition
Sector Breakdown % of Net Assets
Information Technology 37.1%
Financials 11.8%
Communication Services 8.9%
Industrials 8.6%
Health Care 8.5%
Consumer Discretionary 8.1%
Consumer Staples 4.7%
Energy 3.3%
Utilities 2.1%
Cash & Other 6.9%
Type of Security % of Net Assets
Common Stocks 95.1%
Exchange Traded Funds 6.4%
Real Estate Investment Trusts 1.7%
Purchased Options 0.7%
Money Market Funds 0.5%
Investments Purchased with Proceeds from Securities Lending 0.1%
Rights 0.0%
Written Options -4.6%
Cash & Other 0.1%
Horizon Defined Risk Fund | Advisor Class    
Shareholder Report [Line Items]    
Fund Name   Horizon Defined Risk Fund
Class Name   Advisor Class
Trading Symbol   HADRX
Annual or Semi-Annual Statement [Text Block]   This semi-annual shareholder report contains important information about Horizon Defined Risk Fund (the "Fund") for the period of December 1, 2025 to May 31, 2026.
Additional Information [Text Block]   You can find additional information about the Fund at https://www.horizonmutualfunds.com/def-fund. You can also request this information by contacting us at 1-855-754-7932.
Additional Information Phone Number   1-855-754-7932
Additional Information Website   https://www.horizonmutualfunds.com/def-fund
Expenses [Text Block]  
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class Costs of a $10,000 Investment Costs Paid as a Percentage of a $10,000 Investment
Advisor Class $60 1.18%
Expenses Paid, Amount   $ 60
Expense Ratio, Percent   1.18%
Net Assets $ 1,065,109,109 $ 1,065,109,109
Holdings Count | shares 518 518
Investment Company, Portfolio Turnover   1.00%
Additional Fund Statistics [Text Block]  
What are some key Fund statistics?
(as of May 31, 2026)
Net Assets ($) $1,065,109,109
Number of Portfolio Holdings 518
Portfolio Turnover Rate (%) 1%
Holdings [Text Block]  
What did the Fund invest in?
(as of May 31, 2026)
Portfolio Composition
Sector Breakdown % of Net Assets
Information Technology 37.1%
Financials 11.8%
Communication Services 8.9%
Industrials 8.6%
Health Care 8.5%
Consumer Discretionary 8.1%
Consumer Staples 4.7%
Energy 3.3%
Utilities 2.1%
Cash & Other 6.9%
Type of Security % of Net Assets
Common Stocks 95.1%
Exchange Traded Funds 6.4%
Real Estate Investment Trusts 1.7%
Purchased Options 0.7%
Money Market Funds 0.5%
Investments Purchased with Proceeds from Securities Lending 0.1%
Rights 0.0%
Written Options -4.6%
Cash & Other 0.1%
Horizon Equity Premium Income Fund | Investor Class    
Shareholder Report [Line Items]    
Fund Name   Horizon Equity Premium Income Fund
Class Name   Investor Class
Trading Symbol   HNDDX
Annual or Semi-Annual Statement [Text Block]   This semi-annual shareholder report contains important information about Horizon Equity Premium Income Fund (the "Fund") for the period of December 1, 2025 to May 31, 2026.
Additional Information [Text Block]   You can find additional information about the Fund at https://www.horizonmutualfunds.com/epi-fund. You can also request this information by contacting us at 1-855-754-7932.
Additional Information Phone Number   1-855-754-7932
Additional Information Website   https://www.horizonmutualfunds.com/epi-fund
Expenses [Text Block]  
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class Costs of a $10,000 Investment Costs Paid as a Percentage of a $10,000 Investment
Investor Class $54 1.04%
Expenses Paid, Amount   $ 54
Expense Ratio, Percent   1.04%
Net Assets $ 170,467,355 $ 170,467,355
Holdings Count | shares 206 206
Investment Company, Portfolio Turnover   5.00%
Additional Fund Statistics [Text Block]  
What are some key Fund statistics?
(as of May 31, 2026)
Net Assets ($) $170,467,355
Number of Portfolio Holdings 206
Portfolio Turnover Rate (%) 5%
Holdings [Text Block]  
What did the Fund invest in?
(as of May 31, 2026)
Portfolio Composition
Sector Breakdown % of Net Assets
Information Technology 36.5%
Financials 13.1%
Communication Services 10.5%
Health Care 9.6%
Consumer Discretionary 8.9%
Industrials 7.4%
Consumer Staples 5.9%
Energy 3.5%
Utilities 2.5%
Cash & Other 2.1%
Type of Security % of Net Assets
Common Stocks 99.6%
Money Market Funds 0.3%
Real Estate Investment Trusts 0.0%
Written Options -0.1%
Cash & Other 0.2%
Horizon Equity Premium Income Fund | Advisor Class    
Shareholder Report [Line Items]    
Fund Name   Horizon Equity Premium Income Fund
Class Name   Advisor Class
Trading Symbol   HADUX
Annual or Semi-Annual Statement [Text Block]   This semi-annual shareholder report contains important information about Horizon Equity Premium Income Fund (the "Fund") for the period of December 1, 2025 to May 31, 2026.
Additional Information [Text Block]   You can find additional information about the Fund at https://www.horizonmutualfunds.com/epi-fund. You can also request this information by contacting us at 1-855-754-7932.
Additional Information Phone Number   1-855-754-7932
Additional Information Website   https://www.horizonmutualfunds.com/epi-fund
Expenses [Text Block]  
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class Costs of a $10,000 Investment Costs Paid as a Percentage of a $10,000 Investment
Advisor Class $63 1.20%
Expenses Paid, Amount   $ 63
Expense Ratio, Percent   1.20%
Net Assets $ 170,467,355 $ 170,467,355
Holdings Count | shares 206 206
Investment Company, Portfolio Turnover   5.00%
Additional Fund Statistics [Text Block]  
What are some key Fund statistics?
(as of May 31, 2026)
Net Assets ($) $170,467,355
Number of Portfolio Holdings 206
Portfolio Turnover Rate (%) 5%
Holdings [Text Block]  
What did the Fund invest in?
(as of May 31, 2026)
Portfolio Composition
Sector Breakdown % of Net Assets
Information Technology 36.5%
Financials 13.1%
Communication Services 10.5%
Health Care 9.6%
Consumer Discretionary 8.9%
Industrials 7.4%
Consumer Staples 5.9%
Energy 3.5%
Utilities 2.5%
Cash & Other 2.1%
Type of Security % of Net Assets
Common Stocks 99.6%
Money Market Funds 0.3%
Real Estate Investment Trusts 0.0%
Written Options -0.1%
Cash & Other 0.2%
Horizon Multi-Factor Small/Mid Cap Fund | Investor Class    
Shareholder Report [Line Items]    
Fund Name   Horizon Multi-Factor Small/Mid Cap Fund
Class Name   Investor Class
Trading Symbol   HSMNX
Annual or Semi-Annual Statement [Text Block]   This semi-annual shareholder report contains important information about Horizon Multi-Factor Small/Mid Cap Fund (the "Fund") for the period of December 1, 2025 to May 31, 2026.
Additional Information [Text Block]   You can find additional information about the Fund at https://www.horizonmutualfunds.com/smid-fund. You can also request this information by contacting us at 1-855-754-7932.
Additional Information Phone Number   1-855-754-7932
Additional Information Website   https://www.horizonmutualfunds.com/smid-fund
Expenses [Text Block]  
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class Costs of a $10,000 Investment Costs Paid as a Percentage of a $10,000 Investment
Investor Class $56 1.06%
Expenses Paid, Amount   $ 56
Expense Ratio, Percent   1.06%
Net Assets $ 749,346,028 $ 749,346,028
Holdings Count | shares 297 297
Investment Company, Portfolio Turnover   114.00%
Additional Fund Statistics [Text Block]  
What are some key Fund statistics?
(as of May 31, 2026)
Net Assets ($) $749,346,028
Number of Portfolio Holdings 297
Portfolio Turnover Rate (%) 114%
Holdings [Text Block]  
What did the Fund invest in?
(as of May 31, 2026)
Portfolio Composition
Sector Breakdown % of Net Assets
Financials 22.8%
Industrials 20.0%
Information Technology 11.6%
Consumer Discretionary 10.3%
Health Care 9.7%
Energy 8.7%
Real Estate 5.7%
Materials 3.7%
Consumer Staples 3.3%
Cash & Other 4.2%
Type of Security % of Net Assets
Common Stocks 94.7%
Real Estate Investment Trusts 5.1%
Money Market Funds 0.2%
Cash & Other 0.0%
Horizon Multi-Factor Small/Mid Cap Fund | Advisor Class    
Shareholder Report [Line Items]    
Fund Name   Horizon Multi-Factor Small/Mid Cap Fund
Class Name   Advisor Class
Trading Symbol   HSMBX
Annual or Semi-Annual Statement [Text Block]   This semi-annual shareholder report contains important information about Horizon Multi-Factor Small/Mid Cap Fund (the "Fund") for the period of December 1, 2025 to May 31, 2026.
Additional Information [Text Block]   You can find additional information about the Fund at https://www.horizonmutualfunds.com/smid-fund. You can also request this information by contacting us at 1-855-754-7932.
Additional Information Phone Number   1-855-754-7932
Additional Information Website   https://www.horizonmutualfunds.com/smid-fund
Expenses [Text Block]  
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class Costs of a $10,000 Investment Costs Paid as a Percentage of a $10,000 Investment
Advisor Class $66 1.24%
Expenses Paid, Amount   $ 66
Expense Ratio, Percent   1.24%
Net Assets $ 749,346,028 $ 749,346,028
Holdings Count | shares 297 297
Investment Company, Portfolio Turnover   114.00%
Additional Fund Statistics [Text Block]  
What are some key Fund statistics?
(as of May 31, 2026)
Net Assets ($) $749,346,028
Number of Portfolio Holdings 297
Portfolio Turnover Rate (%) 114%
Holdings [Text Block]  
What did the Fund invest in?
(as of May 31, 2026)
Portfolio Composition
Sector Breakdown % of Net Assets
Financials 22.8%
Industrials 20.0%
Information Technology 11.6%
Consumer Discretionary 10.3%
Health Care 9.7%
Energy 8.7%
Real Estate 5.7%
Materials 3.7%
Consumer Staples 3.3%
Cash & Other 4.2%
Type of Security % of Net Assets
Common Stocks 94.7%
Real Estate Investment Trusts 5.1%
Money Market Funds 0.2%
Cash & Other 0.0%
Horizon Multi-Factor U.S. Equity Fund | Investor Class    
Shareholder Report [Line Items]    
Fund Name   Horizon Multi-Factor U.S. Equity Fund
Class Name   Investor Class
Trading Symbol   USRAX
Annual or Semi-Annual Statement [Text Block]   This semi-annual shareholder report contains important information about Horizon Multi-Factor U.S. Equity Fund (the "Fund") for the period of December 1, 2025 to May 31, 2026.
Additional Information [Text Block]   You can find additional information about the Fund at https://www.horizonmutualfunds.com/mfue-fund. You can also request this information by contacting us at 1-855-754-7932.
Additional Information Phone Number   1-855-754-7932
Additional Information Website   https://www.horizonmutualfunds.com/mfue-fund
Expenses [Text Block]  
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class Costs of a $10,000 Investment Costs Paid as a Percentage of a $10,000 Investment
Investor Class $52 1.00%
Expenses Paid, Amount   $ 52
Expense Ratio, Percent   1.00%
Net Assets $ 777,908,650 $ 777,908,650
Holdings Count | shares 159 159
Investment Company, Portfolio Turnover   33.00%
Additional Fund Statistics [Text Block]  
What are some key Fund statistics?
(as of May 31, 2026)
Net Assets ($) $777,908,650
Number of Portfolio Holdings 159
Portfolio Turnover Rate (%) 33%
Holdings [Text Block]  
What did the Fund invest in?
(as of May 31, 2026)
Portfolio Composition
Sector Breakdown % of Net Assets
Information Technology 32.1%
Financials 12.2%
Health Care 11.3%
Communication Services 10.8%
Industrials 7.6%
Energy 6.9%
Consumer Staples 6.0%
Consumer Discretionary 5.1%
Materials 2.9%
Cash & Other 5.1%
Type of Security % of Net Assets
Common Stocks 97.0%
Real Estate Investment Trusts 2.6%
Money Market Funds 0.3%
Cash & Other 0.1%
Horizon Multi-Factor U.S. Equity Fund | Advisor Class    
Shareholder Report [Line Items]    
Fund Name   Horizon Multi-Factor U.S. Equity Fund
Class Name   Advisor Class
Trading Symbol   USRTX
Annual or Semi-Annual Statement [Text Block]   This semi-annual shareholder report contains important information about Horizon Multi-Factor U.S. Equity Fund (the "Fund") for the period of December 1, 2025 to May 31, 2026.
Additional Information [Text Block]   You can find additional information about the Fund at https://www.horizonmutualfunds.com/mfue-fund. You can also request this information by contacting us at 1-855-754-7932.
Additional Information Phone Number   1-855-754-7932
Additional Information Website   https://www.horizonmutualfunds.com/mfue-fund
Expenses [Text Block]  
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class Costs of a $10,000 Investment Costs Paid as a Percentage of a $10,000 Investment
Advisor Class $60 1.15%
Expenses Paid, Amount   $ 60
Expense Ratio, Percent   1.15%
Net Assets $ 777,908,650 $ 777,908,650
Holdings Count | shares 159 159
Investment Company, Portfolio Turnover   33.00%
Additional Fund Statistics [Text Block]  
What are some key Fund statistics?
(as of May 31, 2026)
Net Assets ($) $777,908,650
Number of Portfolio Holdings 159
Portfolio Turnover Rate (%) 33%
Holdings [Text Block]  
What did the Fund invest in?
(as of May 31, 2026)
Portfolio Composition
Sector Breakdown % of Net Assets
Information Technology 32.1%
Financials 12.2%
Health Care 11.3%
Communication Services 10.8%
Industrials 7.6%
Energy 6.9%
Consumer Staples 6.0%
Consumer Discretionary 5.1%
Materials 2.9%
Cash & Other 5.1%
Type of Security % of Net Assets
Common Stocks 97.0%
Real Estate Investment Trusts 2.6%
Money Market Funds 0.3%
Cash & Other 0.1%
Horizon Tactical Fixed Income Fund | Investor Class    
Shareholder Report [Line Items]    
Fund Name   Horizon Tactical Fixed Income Fund
Class Name   Investor Class
Trading Symbol   HTFNX
Annual or Semi-Annual Statement [Text Block]   This semi-annual shareholder report contains important information about Horizon Tactical Fixed Income Fund (the "Fund") for the period of December 1, 2025 to May 31, 2026.
Additional Information [Text Block]   You can find additional information about the Fund at https://www.horizonmutualfunds.com/tfi-fund. You can also request this information by contacting us at 1-855-754-7932.
Additional Information Phone Number   1-855-754-7932
Additional Information Website   https://www.horizonmutualfunds.com/tfi-fund
Expenses [Text Block]  
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class Costs of a $10,000 Investment Costs Paid as a Percentage of a $10,000 Investment
Investor Class $39 0.78%
Expenses Paid, Amount   $ 39
Expense Ratio, Percent   0.78%
Net Assets $ 182,370,957 $ 182,370,957
Holdings Count | shares 9 9
Investment Company, Portfolio Turnover   380.00%
Additional Fund Statistics [Text Block]  
What are some key Fund statistics?
(as of May 31, 2026)
Net Assets ($) $182,370,957
Number of Portfolio Holdings 9
Portfolio Turnover Rate (%) 380%
Holdings [Text Block]  
What did the Fund invest in?
(as of May 31, 2026)
Portfolio Composition
Type of Security % of Net Assets
Exchange Traded Funds 99.9%
Investments Purchased with Proceeds from Securities Lending 34.0%
Money Market Funds 0.2%
Cash & Other -34.1%
Horizon Tactical Fixed Income Fund | Advisor Class    
Shareholder Report [Line Items]    
Fund Name   Horizon Tactical Fixed Income Fund
Class Name   Advisor Class
Trading Symbol   HTFAX
Annual or Semi-Annual Statement [Text Block]   This semi-annual shareholder report contains important information about Horizon Tactical Fixed Income Fund (the "Fund") for the period of December 1, 2025 to May 31, 2026.
Additional Information [Text Block]   You can find additional information about the Fund at https://www.horizonmutualfunds.com/tfi-fund. You can also request this information by contacting us at 1-855-754-7932.
Additional Information Phone Number   1-855-754-7932
Additional Information Website   https://www.horizonmutualfunds.com/tfi-fund
Expenses [Text Block]  
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class Costs of a $10,000 Investment Costs Paid as a Percentage of a $10,000 Investment
Advisor Class $46 0.93%
Expenses Paid, Amount   $ 46
Expense Ratio, Percent   0.93%
Net Assets $ 182,370,957 $ 182,370,957
Holdings Count | shares 9 9
Investment Company, Portfolio Turnover   380.00%
Additional Fund Statistics [Text Block]  
What are some key Fund statistics?
(as of May 31, 2026)
Net Assets ($) $182,370,957
Number of Portfolio Holdings 9
Portfolio Turnover Rate (%) 380%
Holdings [Text Block]  
What did the Fund invest in?
(as of May 31, 2026)
Portfolio Composition
Type of Security % of Net Assets
Exchange Traded Funds 99.9%
Investments Purchased with Proceeds from Securities Lending 34.0%
Money Market Funds 0.2%
Cash & Other -34.1%
Horizon Core Bond ETF    
Shareholder Report [Line Items]    
Fund Name   Horizon Core Bond ETF
Trading Symbol   BNDY
Security Exchange Name   CBOE
Annual or Semi-Annual Statement [Text Block]   This semi-annual shareholder report contains important information about Horizon Core Bond ETF (the "Fund") for the period of December 1, 2025 to May 31, 2026.
Additional Information [Text Block]   You can find additional information about the Fund at https://www.horizonmutualfunds.com/cbf-fund. You can also request this information by contacting us at 1-855-754-7932.
Additional Information Phone Number   1-855-754-7932
Additional Information Website   https://www.horizonmutualfunds.com/cbf-fund
Expenses [Text Block]  
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class Costs of a $10,000 Investment Costs Paid as a Percentage of a $10,000 Investment
Horizon Core Bond ETF $33 0.65%
Expenses Paid, Amount   $ 33
Expense Ratio, Percent   0.65%
Net Assets $ 249,843,443 $ 249,843,443
Holdings Count | shares 6 6
Investment Company, Portfolio Turnover   0.00%
Additional Fund Statistics [Text Block]  
What are some key Fund statistics?
(as of May 31, 2026)
Net Assets ($) $249,843,443
Number of Portfolio Holdings 6
Portfolio Turnover Rate (%) 0%
Holdings [Text Block]  
What did the Fund invest in?
(as of May 31, 2026)
Portfolio Composition
Type of Security % of Net Assets
Exchange Traded Funds 99.3%
Money Market Funds 0.4%
Purchased Options 0.1%
Written Options -0.3%
Cash & Other 0.5%
Horizon Core Equity ETF    
Shareholder Report [Line Items]    
Fund Name   Horizon Core Equity ETF
Trading Symbol   STOX
Security Exchange Name   CBOE
Annual or Semi-Annual Statement [Text Block]   This semi-annual shareholder report contains important information about Horizon Core Equity ETF (the "Fund") for the period of December 1, 2025 to May 31, 2026.
Additional Information [Text Block]   You can find additional information about the Fund at https://www.horizonmutualfunds.com/cef-fund. You can also request this information by contacting us at 1-855-754-7932.
Additional Information Phone Number   1-855-754-7932
Additional Information Website   https://www.horizonmutualfunds.com/cef-fund
Expenses [Text Block]  
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class Costs of a $10,000 Investment Costs Paid as a Percentage of a $10,000 Investment
Horizon Core Equity ETF $37 0.71%
Expenses Paid, Amount   $ 37
Expense Ratio, Percent   0.71%
Net Assets $ 155,149,230 $ 155,149,230
Holdings Count | shares 170 170
Investment Company, Portfolio Turnover   16.00%
Additional Fund Statistics [Text Block]  
What are some key Fund statistics?
(as of May 31, 2026)
Net Assets ($) $155,149,230
Number of Portfolio Holdings 170
Portfolio Turnover Rate (%) 16%
Holdings [Text Block]  
What did the Fund invest in?
(as of May 31, 2026)
Portfolio Composition
Sector Breakdown % of Net Assets
Information Technology 34.5%
Financials 11.1%
Communication Services 9.2%
Health Care 9.0%
Consumer Discretionary 7.9%
Industrials 7.1%
Consumer Staples 5.5%
Energy 3.5%
Materials 1.8%
Cash & Other 10.4%
Portfolio Composition
Type of Security % of Net Assets
Common Stocks 91.3%
Exchange Traded Funds 6.7%
Real Estate Investment Trusts 1.6%
Money Market Funds 0.2%
Purchased Options 0.0%
Written Options 0.0%
Cash & Other 0.2%
Horizon Digital Frontier ETF    
Shareholder Report [Line Items]    
Fund Name   Horizon Digital Frontier ETF
Trading Symbol   YNOT
Security Exchange Name   NASDAQ
Annual or Semi-Annual Statement [Text Block]   This semi-annual shareholder report contains important information about Horizon Digital Frontier ETF (the "Fund") for the period of December 1, 2025 to May 31, 2026.
Additional Information [Text Block]   You can find additional information about the Fund at https://www.horizonmutualfunds.com/dff-fund. You can also request this information by contacting us at 1-855-754-7932.
Additional Information Phone Number   1-855-754-7932
Additional Information Website   https://www.horizonmutualfunds.com/dff-fund
Expenses [Text Block]  
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class Costs of a $10,000 Investment Costs Paid as a Percentage of a $10,000 Investment
Horizon Digital Frontier ETF $41 0.75%
Expenses Paid, Amount   $ 41
Expense Ratio, Percent   0.75%
Net Assets $ 124,514,147 $ 124,514,147
Holdings Count | shares 105 105
Investment Company, Portfolio Turnover   57.00%
Additional Fund Statistics [Text Block]  
What are some key Fund statistics?
(as of May 31, 2026)
Net Assets ($) $124,514,147
Number of Portfolio Holdings 105
Portfolio Turnover Rate (%) 57%
Holdings [Text Block]  
What did the Fund invest in?
(as of May 31, 2026)
Portfolio Composition
Sector Breakdown % of Net Assets
Information Technology 50.7%
Industrials 15.6%
Communication Services 12.5%
Consumer Discretionary 8.3%
Materials 8.2%
Financials 1.8%
Utilities 1.2%
Health Care 0.7%
Energy 0.6%
Cash & Other 0.4%
Portfolio Composition
Type of Security % of Net Assets
Common Stocks 99.6%
Money Market Funds 0.3%
Purchased Options 0.0%
Written Options -0.3%
Cash & Other 0.4%
Horizon Dividend Income ETF    
Shareholder Report [Line Items]    
Fund Name   Horizon Dividend Income ETF
Trading Symbol   DIVN
Security Exchange Name   CBOE
Annual or Semi-Annual Statement [Text Block]   This semi-annual shareholder report contains important information about Horizon Dividend Income ETF (the "Fund") for the period of December 1, 2025 to May 31, 2026.
Additional Information [Text Block]   You can find additional information about the Fund at https://www.horizonmutualfunds.com/dif-fund. You can also request this information by contacting us at 1-855-754-7932.
Additional Information Phone Number   1-855-754-7932
Additional Information Website   https://www.horizonmutualfunds.com/dif-fund
Expenses [Text Block]  
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class Costs of a $10,000 Investment Costs Paid as a Percentage of a $10,000 Investment
Horizon Dividend Income ETF $37 0.70%
Expenses Paid, Amount   $ 37
Expense Ratio, Percent   0.70%
Net Assets $ 185,702,630 $ 185,702,630
Holdings Count | shares 129 129
Investment Company, Portfolio Turnover   14.00%
Additional Fund Statistics [Text Block]  
What are some key Fund statistics?
(as of May 31, 2026)
Net Assets ($) $185,702,630
Number of Portfolio Holdings 129
Portfolio Turnover Rate (%) 14%
Holdings [Text Block]  
What did the Fund invest in?
(as of May 31, 2026)
Portfolio Composition
Sector Breakdown % of Net Assets
Information Technology 23.5%
Health Care 18.5%
Consumer Staples 13.5%
Financials 13.2%
Energy 7.8%
Consumer Discretionary 7.7%
Industrials 7.4%
Communication Services 7.4%
Materials 0.6%
Cash & Other 0.4%
Portfolio Composition
Type of Security % of Net Assets
Common Stocks 100.0%
Money Market Funds 0.0%
Written Options 0.0%
Cash & Other 0.0%
Horizon Expedition Plus ETF    
Shareholder Report [Line Items]    
Fund Name   Horizon Expedition Plus ETF
Trading Symbol   HBTA
Security Exchange Name   NYSEArca
Annual or Semi-Annual Statement [Text Block]   This semi-annual shareholder report contains important information about Horizon Expedition Plus ETF (the "Fund") for the period of December 1, 2025 to May 31, 2026.
Additional Information [Text Block]   You can find additional information about the Fund at https://www.horizonmutualfunds.com/hbta-fund. You can also request this information by contacting us at 1-855-754-7932.
Additional Information Phone Number   1-855-754-7932
Additional Information Website   https://www.horizonmutualfunds.com/hbta-fund
Expenses [Text Block]  
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class Costs of a $10,000 Investment Costs Paid as a Percentage of a $10,000 Investment
Horizon Expedition Plus ETF $46 0.86%
Expenses Paid, Amount   $ 46
Expense Ratio, Percent   0.86%
Net Assets $ 155,893,868 $ 155,893,868
Holdings Count | shares 210 210
Investment Company, Portfolio Turnover   18.00%
Additional Fund Statistics [Text Block]  
What are some key Fund statistics?
(as of May 31, 2026)
Net Assets ($) $155,893,868
Number of Portfolio Holdings 210
Portfolio Turnover Rate (%) 18%
Holdings [Text Block]  
What did the Fund invest in?
(as of May 31, 2026)
Portfolio Composition
Sector Breakdown % of Net Assets
Information Technology 37.5%
Communication Services 10.6%
Industrials 9.9%
Consumer Discretionary 8.8%
Financials 7.6%
Health Care 5.4%
Energy 3.5%
Consumer Staples 3.4%
Materials 1.5%
Cash & Other 11.8%
Portfolio Composition
Type of Security % of Net Assets
Common Stocks 89.3%
Exchange Traded Funds 8.7%
Real Estate Investment Trusts 1.4%
Money Market Funds 0.4%
Purchased Options 0.3%
Written Options -0.5%
Cash & Other 0.4%
Horizon Flexible Income ETF    
Shareholder Report [Line Items]    
Fund Name   Horizon Flexible Income ETF
Trading Symbol   FLXN
Security Exchange Name   CBOE
Annual or Semi-Annual Statement [Text Block]   This semi-annual shareholder report contains important information about Horizon Flexible Income ETF (the "Fund") for the period of December 1, 2025 to May 31, 2026.
Additional Information [Text Block]   You can find additional information about the Fund at https://www.horizonmutualfunds.com/fif-fund. You can also request this information by contacting us at 1-855-754-7932.
Additional Information Phone Number   1-855-754-7932
Additional Information Website   https://www.horizonmutualfunds.com/fif-fund
Expenses [Text Block]  
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class Costs of a $10,000 Investment Costs Paid as a Percentage of a $10,000 Investment
Horizon Flexible Income ETF $41 0.80%
Expenses Paid, Amount   $ 41
Expense Ratio, Percent   0.80%
Net Assets $ 49,315,590 $ 49,315,590
Holdings Count | shares 6 6
Investment Company, Portfolio Turnover   2.00%
Additional Fund Statistics [Text Block]  
What are some key Fund statistics?
(as of May 31, 2026)
Net Assets ($) $49,315,590
Number of Portfolio Holdings 6
Portfolio Turnover Rate (%) 2%
Holdings [Text Block]  
What did the Fund invest in?
(as of May 31, 2026)
Portfolio Composition
Type of Security % of Net Assets
Exchange Traded Funds 99.5%
Money Market Funds 0.0%
Purchased Options 0.0%
Written Options -0.1%
Cash & Other 0.6%
Horizon International Equity ETF    
Shareholder Report [Line Items]    
Fund Name Horizon International Equity ETF  
Trading Symbol FRGN  
Security Exchange Name NYSEArca  
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Horizon International Equity ETF (the "Fund") for the period December 2, 2025 to May 31, 2026.  
Additional Information [Text Block] You can find additional information about the Fund at https://horizonmutualfunds.com/ie-fund. You can also request this information by contacting us at 1-855-754-7932.  
Additional Information Phone Number 1-855-754-7932  
Additional Information Website https://horizonmutualfunds.com/ie-fund  
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class Costs of a $10,000 Investment Costs Paid as a Percentage of a $10,000 Investment
Horizon International Equity ETF1 $42 0.75%
 
Expenses Paid, Amount $ 42  
Expense Ratio, Percent 0.75%  
Expenses Short Period Footnote [Text Block] Expense reported are for the period of December 2, 2025 to May 31, 2026. Expenses for the full reporting period would be higher.  
Net Assets $ 101,362,223 $ 101,362,223
Holdings Count | shares 284 284
Investment Company, Portfolio Turnover 64.00%  
Additional Fund Statistics [Text Block]
What are some key Fund statistics?
(as of May 31, 2026)
Net Assets ($) $101,362,223
Number of Portfolio Holdings 284
Portfolio Turnover Rate (%) 64%
 
Holdings [Text Block]
What did the Fund invest in?
(as of May 31, 2026)
Geographic Breakdown % of Net Assets
Japan 15.3%
Canada 9.5%
Taiwan 8.7%
United Kingdom 8.2%
South Korea 7.9%
France 6.4%
Switzerland 6.1%
Netherlands 5.0%
China 4.5%
Cash & Other 28.4%
Portfolio Composition
Type of Security % of Net Assets
Common Stocks 97.3%
Exchange Traded Funds 1.0%
Preferred Stocks 0.7%
Real Estate Investment Trusts 0.6%
Money Market Funds 0.0%
Cash & Other 0.4%
 
Horizon International Managed Risk ETF    
Shareholder Report [Line Items]    
Fund Name Horizon International Managed Risk ETF  
Trading Symbol SFTX  
Security Exchange Name NYSEArca  
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Horizon International Managed Risk ETF (the "Fund") for the period December 2, 2025 to May 31, 2026.  
Additional Information [Text Block] You can find additional information about the Fund at https://horizonmutualfunds.com/imr-fund. You can also request this information by contacting us at 1-855-754-7932.  
Additional Information Phone Number 1-855-754-7932  
Additional Information Website https://horizonmutualfunds.com/imr-fund  
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class Costs of a $10,000 Investment Costs Paid as a Percentage of a $10,000 Investment
Horizon International Managed Risk ETF1 $45 0.82%
 
Expenses Paid, Amount $ 45  
Expense Ratio, Percent 0.82%  
Expenses Short Period Footnote [Text Block] Expense reported are for the period of December 2, 2025 to May 31, 2026. Expenses for the full reporting period would be higher.  
Net Assets $ 424,356,864 $ 424,356,864
Holdings Count | shares 283 283
Investment Company, Portfolio Turnover 108.00%  
Additional Fund Statistics [Text Block]
What are some key Fund statistics?
(as of May 31, 2026)
Net Assets ($) $424,356,864
Number of Portfolio Holdings 283
Portfolio Turnover Rate (%) 108%
 
Holdings [Text Block]
What did the Fund invest in?
(as of May 31, 2026)
Geographic Breakdown % of Net Assets
Japan 15.5%
Canada 9.5%
Taiwan 8.7%
United Kingdom 8.2%
South Korea 8.0%
France 6.3%
Switzerland 6.0%
Netherlands 5.0%
China 4.5%
Cash & Other 28.3%
Portfolio Composition
Type of Security % of Net Assets
Common Stocks 97.4%
Exchange Traded Funds 1.0%
Preferred Stocks 0.7%
Real Estate Investment Trusts 0.6%
Cash & Other 0.3%
 
Horizon Landmark ETF    
Shareholder Report [Line Items]    
Fund Name   Horizon Landmark ETF
Trading Symbol   BENJ
Security Exchange Name   NYSEArca
Annual or Semi-Annual Statement [Text Block]   This semi-annual shareholder report contains important information about Horizon Landmark ETF (the "Fund") for the period of December 1, 2025 to May 31, 2026.
Additional Information [Text Block]   You can find additional information about the Fund at https://www.horizonmutualfunds.com/benj-fund. You can also request this information by contacting us at 1-855-754-7932.
Additional Information Phone Number   1-855-754-7932
Additional Information Website   https://www.horizonmutualfunds.com/benj-fund
Expenses [Text Block]  
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class Costs of a $10,000 Investment Costs Paid as a Percentage of a $10,000 Investment
Horizon Landmark ETF $20 0.40%
Expenses Paid, Amount   $ 20
Expense Ratio, Percent   0.40%
Net Assets $ 236,287,275 $ 236,287,275
Holdings Count | shares 5 5
Investment Company, Portfolio Turnover   0.00%
Additional Fund Statistics [Text Block]  
What are some key Fund statistics?
(as of May 31, 2026)
Net Assets ($) $236,287,275
Number of Portfolio Holdings 5
Portfolio Turnover Rate (%) 0%
Holdings [Text Block]  
What did the Fund invest in?
(as of May 31, 2026)
Portfolio Composition
Type of Security % of Net Assets
Purchased Options 100.0%
Money Market Funds 0.4%
Cash & Other -0.4%
Horizon Managed Risk ETF    
Shareholder Report [Line Items]    
Fund Name   Horizon Managed Risk ETF
Trading Symbol   SFTY
Security Exchange Name   CBOE
Annual or Semi-Annual Statement [Text Block]   This semi-annual shareholder report contains important information about Horizon Managed Risk ETF (the "Fund") for the period of December 1, 2025 to May 31, 2026.
Additional Information [Text Block]   You can find additional information about the Fund at https://www.horizonmutualfunds.com/mrf-fund. You can also request this information by contacting us at 1-855-754-7932.
Additional Information Phone Number   1-855-754-7932
Additional Information Website   https://www.horizonmutualfunds.com/mrf-fund
Expenses [Text Block]  
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class Costs of a $10,000 Investment Costs Paid as a Percentage of a $10,000 Investment
Horizon Managed Risk ETF $41 0.78%
Expenses Paid, Amount   $ 41
Expense Ratio, Percent   0.78%
Net Assets $ 471,620,270 $ 471,620,270
Holdings Count | shares 164 164
Investment Company, Portfolio Turnover   10.00%
Additional Fund Statistics [Text Block]  
What are some key Fund statistics?
(as of May 31, 2026)
Net Assets ($) $471,620,270
Number of Portfolio Holdings 164
Portfolio Turnover Rate (%) 10%
Holdings [Text Block]  
What did the Fund invest in?
(as of May 31, 2026)
Portfolio Composition
Sector Breakdown % of Net Assets
Information Technology 34.6%
Financials 11.1%
Communication Services 9.2%
Health Care 9.0%
Consumer Discretionary 7.9%
Industrials 7.0%
Consumer Staples 5.5%
Energy 3.5%
Materials 1.8%
Cash & Other 10.4%
Portfolio Composition
Type of Security % of Net Assets
Common Stocks 91.3%
Exchange Traded Funds 6.7%
Real Estate Investment Trusts 1.6%
Money Market Funds 0.3%
Cash & Other 0.1%
Horizon Nasdaq-100 Defined Risk ETF    
Shareholder Report [Line Items]    
Fund Name   Horizon Nasdaq-100 Defined Risk ETF
Trading Symbol   QGRD
Security Exchange Name   NASDAQ
Annual or Semi-Annual Statement [Text Block]   This semi-annual shareholder report contains important information about Horizon Nasdaq-100 Defined Risk ETF (the "Fund") for the period of December 1, 2025 to May 31, 2026.
Additional Information [Text Block]   You can find additional information about the Fund at https://www.horizonmutualfunds.com/n1d-fund. You can also request this information by contacting us at 1-855-754-7932.
Additional Information Phone Number   1-855-754-7932
Additional Information Website   https://www.horizonmutualfunds.com/n1d-fund
Expenses [Text Block]  
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class Costs of a $10,000 Investment Costs Paid as a Percentage of a $10,000 Investment
Horizon Nasdaq-100 Defined Risk ETF $45 0.85%
Expenses Paid, Amount   $ 45
Expense Ratio, Percent   0.85%
Net Assets $ 104,917,050 $ 104,917,050
Holdings Count | shares 12 12
Investment Company, Portfolio Turnover   0.00%
Additional Fund Statistics [Text Block]  
What are some key Fund statistics?
(as of May 31, 2026)
Net Assets ($) $104,917,050
Number of Portfolio Holdings 12
Portfolio Turnover Rate (%) 0%
Holdings [Text Block]  
What did the Fund invest in?
(as of May 31, 2026)
Portfolio Composition
Type of Security % of Net Assets
Purchased Options 99.7%
Money Market Funds 0.1%
Written Options -0.3%
Cash & Other 0.5%
Horizon Small/Mid Cap Core Equity ETF    
Shareholder Report [Line Items]    
Fund Name Horizon Small/Mid Cap Core Equity ETF  
Trading Symbol SMOX  
Security Exchange Name NYSEArca  
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Horizon Small/Mid Cap Core Equity ETF (the "Fund") for the period December 2, 2025 to May 31, 2026.  
Additional Information [Text Block] You can find additional information about the Fund at https://horizonmutualfunds.com/smcc-fund. You can also request this information by contacting us at 1-855-754-7932.  
Additional Information Phone Number 1-855-754-7932  
Additional Information Website https://horizonmutualfunds.com/smcc-fund  
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Class Costs of a $10,000 Investment Costs Paid as a Percentage of a $10,000 Investment
Horizon Small/Mid Cap Core Equity ETF1 $40 0.75%
 
Expenses Paid, Amount $ 40  
Expense Ratio, Percent 0.75%  
Expenses Short Period Footnote [Text Block] Expense reported are for the period of December 2, 2025 to May 31, 2026. Expenses for the full reporting period would be higher.  
Net Assets $ 70,564,167 $ 70,564,167
Holdings Count | shares 293 293
Investment Company, Portfolio Turnover 37.00%  
Additional Fund Statistics [Text Block]
What are some key Fund statistics?
(as of May 31, 2026)
Net Assets ($) $70,564,167
Number of Portfolio Holdings 293
Portfolio Turnover Rate (%) 37%
 
Holdings [Text Block]
What did the Fund invest in?
(as of May 31, 2026)
Portfolio Composition
Sector Breakdown % of Net Assets
Industrials 23.2%
Financials 15.0%
Information Technology 14.0%
Consumer Discretionary 10.3%
Health Care 8.7%
Real Estate 7.0%
Energy 6.8%
Materials 4.7%
Consumer Staples 4.7%
Cash & Other 5.6%
Portfolio Composition
Type of Security % of Net Assets
Common Stocks 91.7%
Real Estate Investment Trusts 6.5%
Money Market Funds 0.7%
Purchased Options 0.2%
Written Options -0.5%
Cash & Other 1.4%