Form N-CSR Cover |
6 Months Ended |
|---|---|
Mar. 31, 2026 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS/A |
| Amendment Flag | true |
| Amendment Description | This amendment is being filed to correct the presentation of share activity in the beneficial share ownership table. In the original filing, redemption shares were inadvertently reported as positive amounts. Except as set forth above and the dates included on the signature page and the certifications required by Rule 30a-2(a) and Rule 30a-2(b), this amendment does not amend, update or change any other information or disclosures contained in the original filing. |
| Registrant Name | COLORADO BONDSHARES A TAX EXEMPT FUND |
| Entity Central Index Key | 0000810744 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Mar. 31, 2026 |