Shareholder Report |
12 Months Ended |
|---|---|
|
Apr. 30, 2026
USD ($)
Holding
| |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | Capitol Series Trust |
| Entity Central Index Key | 0001587551 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Apr. 30, 2026 |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report |
| C000167184 | |
| Shareholder Report [Line Items] | |
| Class Name | Institutional Shares |
| Trading Symbol | CAPTX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Canterbury Portfolio Thermostat Fund (the “Fund”) for the period of May 1, 2025 through April 30, 2026. |
| Additional Information [Text Block] | You can find additional information about the Fund at https://www.canterburygroup.com/mutualfund. You can also request this information by contacting us at (844) 838-2121. |
| Additional Information Phone Number | (844) 838-2121 |
| Additional Information Website | https://www.canterburygroup.com/mutualfund |
| Expenses [Text Block] | |
| Expenses Paid, Amount | $ 438 |
| Expense Ratio, Percent | 3.87% |
| Performance Past Does Not Indicate Future [Text] | The Fund’s past performance is not a good predictor of how the Fund will perform in the future. |
| Performance Inception Date | Aug. 02, 2016 |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
| AssetsNet | $ 8,874,240 |
| Holdings Count | Holding | 19 |
| Advisory Fees Paid, Amount | $ 73,249 |
| InvestmentCompanyPortfolioTurnover | 59.00% |
| Additional Fund Statistics [Text Block] | |
| Holdings [Text Block] |