v3.26.1
Shareholder Report
 6 Months Ended
Mar. 31, 2026
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name INVESTMENT MANAGERS SERIES TRUST
Entity Central Index Key 0001318342
Entity Investment Company Type N-1A
Document Period End Date Mar. 31, 2026
C000092548 [Member]  
Shareholder Report [Line Items]  
Fund Name Ironclad Managed Risk Fund
Class Name Ironclad Managed Risk Fund
Trading Symbol IRONX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Ironclad Managed Risk Fund (“Fund”) for the period of October 1, 2025 to March 31, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.ironcladfunds.com/fund-literature. You can also request this information by contacting us at (888) 979-IRON (4766).
Additional Information Phone Number (888) 979-IRON (4766)
Additional Information Website https://www.ironcladfunds.com/fund-literature
Expenses [Text Block]
Fund Expenses
(Based on a hypothetical $10,000 investment)
Fund Costs of a $10,000 investment Costs paid as a percentage
of a $10,000 investment
Ironclad Managed Risk Fund
(IRONX)		 $62 1.25%1
​1
Annualized.
Expenses Paid, Amount $ 62
Expense Ratio, Percent 1.25% [1]
Net Assets $ 214,874,092
Holdings Count | Holding 19
Investment Company Portfolio Turnover 0.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
The following table outlines key fund statistics that you should pay attention to.
Fund net assets $214,874,092
Total number of portfolio holdings 19
Portfolio turnover rate as of the end of the reporting period 0%
Holdings [Text Block]
Graphical Representation of Holdings
The tables below show the investment makeup of the Fund, representing percentage of the total net assets of the Fund.
Top Ten Holdings
iShares Core S&P 500 ETF 47.2%
Vanguard S&P 500 ETF 45.7%
State Street SPDR S&P 500 ETF Trust 2.0%
S&P 500 Index Options, Exercise Price: $6,700.00, Expiration Date: 4/30/26 1.8%
S&P 500 Index Options, Exercise Price: $6,500.00, Expiration Date: 6/18/26 1.7%
S&P 500 Index Options, Exercise Price: $6,700.00, Expiration Date: 4/17/26 1.4%
S&P 500 Index Options, Exercise Price: $6,000.00, Expiration Date: 4/30/26 0.3%
S&P 500 Index Options, Exercise Price: $5,100.00, Expiration Date: 6/18/26 0.2%
S&P 500 Index Options, Exercise Price: $6,000.00, Expiration Date: 4/17/26 0.1%
S&P 500 Index Options, Exercise Price: $5,500.00, Expiration Date: 4/30/26 0.1%
Asset Allocation
Graphical Representation - Allocation 1 Chart
Largest Holdings [Text Block]
Top Ten Holdings
iShares Core S&P 500 ETF 47.2%
Vanguard S&P 500 ETF 45.7%
State Street SPDR S&P 500 ETF Trust 2.0%
S&P 500 Index Options, Exercise Price: $6,700.00, Expiration Date: 4/30/26 1.8%
S&P 500 Index Options, Exercise Price: $6,500.00, Expiration Date: 6/18/26 1.7%
S&P 500 Index Options, Exercise Price: $6,700.00, Expiration Date: 4/17/26 1.4%
S&P 500 Index Options, Exercise Price: $6,000.00, Expiration Date: 4/30/26 0.3%
S&P 500 Index Options, Exercise Price: $5,100.00, Expiration Date: 6/18/26 0.2%
S&P 500 Index Options, Exercise Price: $6,000.00, Expiration Date: 4/17/26 0.1%
S&P 500 Index Options, Exercise Price: $5,500.00, Expiration Date: 4/30/26 0.1%
Accountant Change Disagreements [Text Block]
Changes in and Disagreements with Accountants
There were no changes in or disagreements with the Fund's accountants during the reporting period.
[1] Annualized.