v3.26.1
Shareholder Report
 6 Months Ended
Apr. 30, 2026
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name Northern Lights Fund Trust IV
Entity Central Index Key 0001644419
Entity Investment Company Type N-1A
Document Period End Date Apr. 30, 2026
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
C000228990  
Shareholder Report [Line Items]  
Trading Symbol INTL
Security Exchange Name CboeBZX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Main International ETF for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.mainmgtetfs.com/intl/. You can also request this information by contacting us at 1-866-383-9778
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.
Additional Information Phone Number 1-866-383-9778
Additional Information Website https://www.mainmgtetfs.com/intl/
Expenses [Text Block]

What were the Fund’s costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Main International ETF
$35
0.67%Footnote Reference*
FootnoteDescription
Footnote*
Annualized
Expenses Paid, Amount $ 35
Expense Ratio, Percent 0.67% [1]
AssetsNet $ 221,520,699
Holdings Count | Holding 10
Advisory Fees Paid, Amount $ 504,925
InvestmentCompanyPortfolioTurnover 12.00%
Additional Fund Statistics [Text Block]

Fund Statistics 

Table Summary
Net Assets
$221,520,699
Number of Portfolio Holdings
10
Advisory Fee
$504,925
Portfolio Turnover
12%
Holdings [Text Block]

Asset Weighting (% of total investments)

Group By Asset Type Chart
Table Summary
Value
Value
Exchange-Traded Funds
95.0%
Money Market Funds
5.0%

Asset Weighting (% of net assets)

Group By Sector Chart
Table Summary
Value
Value
Liabilities in Excess of Other Assets
-5.1%
Money Market Funds
0.2%
Collateral for Securities Loaned
5.0%
Equity
99.9%

Top Holdings (% of net assets)

Table Summary
Holding Name
% of Net Assets
iShares Core MSCI International Developed Markets ETF
38.4%
iShares Core MSCI Emerging Markets ETF
18.3%
State Street SPDR Portfolio Europe ETF
12.2%
iShares Latin America 40 ETF
10.9%
Vanguard FTSE Pacific ETF
7.9%
SPDR Portfolio Emerging Markets ETF
7.1%
State Street Navigator Securities Lending Government Money Market Portfolio
5.0%
Franklin FTSE Canada ETF
2.6%
Franklin FTSE China ETF
2.5%
State Street Institutional Treasury Money Market Fund, Premier Class
0.2%
C000190408  
Shareholder Report [Line Items]  
Trading Symbol SECT
Security Exchange Name CboeBZX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Main Sector Rotation ETF for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.mainmgtetfs.com/sect/. You can also request this information by contacting us at 1-866-383-9778
Material Fund Change Notice [Text Block] This report describes changes to the Fund that occurred during the reporting period.
Additional Information Phone Number 1-866-383-9778
Additional Information Website https://www.mainmgtetfs.com/sect/
Expenses [Text Block]

What were the Fund’s costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Main Sector Rotation ETF
$28
0.56%Footnote Reference*
FootnoteDescription
Footnote*
Annualized
Expenses Paid, Amount $ 28
Expense Ratio, Percent 0.56% [2]
AssetsNet $ 2,566,883,600
Holdings Count | Holding 13
Advisory Fees Paid, Amount $ 6,044,013
InvestmentCompanyPortfolioTurnover 29.00%
Additional Fund Statistics [Text Block]

Fund Statistics 

Table Summary
Net Assets
$2,566,883,600
Number of Portfolio Holdings
13
Advisory Fee
$6,044,013
Portfolio Turnover
29%
Holdings [Text Block]

Asset Weighting (% of total investments)

Group By Asset Type Chart
Table Summary
Value
Value
Exchange-Traded Funds
96.2%
Money Market Funds
3.8%

Asset Weighting (% of net assets)

Group By Sector Chart
Table Summary
Value
Value
Liabilities in Excess of Other Assets
-3.7%
Money Market Funds
0.2%
Collateral for Securities Loaned
3.7%
Equity
99.8%

Top 10 Holdings (% of net assets)

Table Summary
Holding Name
% of Net Assets
State Street Technology Select Sector SPDR ETF
33.1%
State Street Financial Select Sector SPDR ETF
14.7%
State Street Industrial Select Sector SPDR ETF
10.6%
State Street Communication Services Select Sector SPDR ETF
10.5%
State Street Consumer Discretionary Select Sector SPDR ETF
9.7%
Invesco Nasdaq 100 ETF
6.2%
State Street Energy Select Sector SPDR ETF
4.2%
State Street Materials Select Sector SPDR ETF
4.2%
State Street Navigator Securities Lending Government Money Market Portfolio
3.7%
iShares U.S. Home Construction ETF
2.4%
C000223946  
Shareholder Report [Line Items]  
Trading Symbol TMAT
Security Exchange Name CboeBZX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Main Thematic Innovation ETF for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://www.mainmgtetfs.com/tmat/. You can also request this information by contacting us at 1-866-383-9778.
Additional Information Phone Number 1-866-383-9778
Additional Information Website https://www.mainmgtetfs.com/tmat/
Expenses [Text Block]

What were the Fund’s costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Main Thematic Innovation ETF
$37
0.78%Footnote Reference*
FootnoteDescription
Footnote*
Annualized
Expenses Paid, Amount $ 37
Expense Ratio, Percent 0.78% [3]
AssetsNet $ 210,764,169
Holdings Count | Holding 90
Advisory Fees Paid, Amount $ 644,900
InvestmentCompanyPortfolioTurnover 88.00%
Additional Fund Statistics [Text Block]

Fund Statistics 

Table Summary
Net Assets
$210,764,169
Number of Portfolio Holdings
90
Advisory Fee
$644,900
Portfolio Turnover
88%
Holdings [Text Block]

Asset Weighting (% of total investments)

Group By Asset Type Chart
Table Summary
Value
Value
Common Stocks
98.6%
Money Market Funds
1.4%

Sector Weighting (% of net assets)

Group By Sector Chart
Table Summary
Value
Value
Liabilities in Excess of Other Assets
-0.6%
Collateral for Securities Loaned
0.7%
Money Market Funds
0.7%
Utilities
2.5%
Health Care
5.6%
Materials
9.8%
Industrials
31.0%
Technology
50.3%

Top 10 Holdings (% of net assets)

Table Summary
Holding Name
% of Net Assets
Vicor Corporation
3.0%
Micron Technology, Inc.
2.8%
Lumentum Holdings, Inc.
2.7%
Ciena Corporation
2.6%
Palo Alto Networks, Inc.
2.5%
Clear Secure, Inc., Class A
2.5%
Keysight Technologies, Inc.
2.2%
Modine Manufacturing Company
1.9%
Advanced Energy Industries, Inc.
1.9%
AAON, Inc.
1.9%
[1] Annualized
[2] Annualized
[3] Annualized