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Note 6 - Indebtedness (Details Textual) $ in Thousands |  |  |  | 1 Months Ended | 3 Months Ended | 6 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Oct. 10, 2025 | Aug. 15, 2025 USD ($) | Apr. 05, 2024 | Oct. 31, 2025 USD ($) | Sep. 30, 2025 USD ($) | Sep. 30, 2025 USD ($) | Sep. 30, 2024 USD ($) | Aug. 12, 2025 USD ($) | Apr. 05, 2025 USD ($) | Mar. 31, 2025 USD ($) | Oct. 05, 2023 USD ($) | Mar. 05, 2021 USD ($) | Aug. 12, 2019
Long-Term Debt |  |  |  |  | $ 69,375 | $ 69,375 |  |  |  |  |  |  |
Repayments of Debt |  |  |  |  |  | 13,375 | $ 16,875 |  |  |  |  |  |
Senior Secured Credit Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Long-Term Debt |  |  |  |  | 106,000 | 106,000 |  |  |  |  |  |  |
Line of Credit Facility, Remaining Borrowing Capacity |  |  |  |  | 19,000 | 19,000 |  |  |  |  |  |  |
Senior Secured Credit Agreement [Member] | Prepaid Expenses, Other and Other Assets [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Issuance Costs, Net |  |  |  |  | $ 1,053 | $ 1,053 |  |  |  | $ 1,203 |  |  |
Senior Secured Credit Agreement [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of Lines of Credit |  |  |  | $ 2,000 |  |  |  |  |  |  |  |  |
Senior Secured Credit Agreement [Member] | Revolving Credit Facility [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  |  |  |  |  |  |  | $ 75,000 |
Long-Term Debt |  |  |  |  |  |  |  | $ 97,000 |  |  |  |  |
Debt, Weighted Average Interest Rate |  |  |  |  | 7.10% | 7.10% |  |  |  |  |  |  |
Proceeds from Lines of Credit |  | $ 97,000 |  |  |  |  |  |  |  |  |  |  |
Senior Secured Credit Agreement [Member] | Revolving Credit Facility [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, Weighted Average Interest Rate | 6.70% |  |  |  |  |  |  |  |  |  |  |  |
Senior Secured Credit Agreement [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  |  |  | 3.50% |  |  |  |  |  |  |
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage |  |  |  |  |  | 0.35% |  |  |  |  |  |  |
Senior Secured Credit Agreement [Member] | Maximum [Member] | Swingline Loan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  |  |  |  |  |  |  | 5,000 |
Senior Secured Credit Agreement [Member] | Maximum [Member] | Revolving Credit Facility [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  |  |  |  |  |  | $ 125,000 |  |
Senior Secured Credit Agreement [Member] | Maximum [Member] | Revolving Credit Facility [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 2.50% |  |  |  |  |  |  |  |  |  |  |  |
Senior Secured Credit Agreement [Member] | Maximum [Member] | Letter of Credit [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  |  |  |  |  |  |  | $ 2,500 |
Senior Secured Credit Agreement [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  |  |  | 1.50% |  |  |  |  |  |  |
Fixed Charge Coverage Ratio |  |  | 1.25 |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage |  |  |  |  |  | 0.20% |  |  |  |  |  |  |
Senior Secured Credit Agreement [Member] | Minimum [Member] | Revolving Credit Facility [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 1.25% |  |  |  |  |  |  |  |  |  |  |  |
Term Loan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Long-Term Debt, Gross |  |  |  |  | $ 69,375 | $ 69,375 |  |  | $ 75,000 | 71,250 |  |  |
Debt Instrument, Periodic Payment, Principal |  |  |  |  | 938 | 1,875 |  |  |  |  |  |  |
The Credit Facility Term Loan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Covenant, Maximum Total Leverage Ratio for the Sixth, Seventh, and Eighth Testing Dates |  |  | 4 |  |  |  |  |  |  |  |  |  |
Debt Instrument, Covenant, Maximum Total Leverage Ratio Following the Ninth Testing date |  |  | 3.5 |  |  |  |  |  |  |  |  |  |
The Notes [Member] | Senior Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Long-Term Debt, Gross |  |  |  |  | 0 | 0 |  |  |  | 97,500 |  |  |
Long-Term Debt |  |  |  |  | 0 | 0 |  |  |  | 97,297 |  |  |
Debt Issuance Costs, Net |  |  |  |  | $ (0) | $ (0) |  |  |  | $ 203 |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  |  |  |  |  |  | 1.375%
Debt Instrument, Interest Rate, Effective Percentage |  |  |  |  | 1.90% | 1.90% |  |  |  |  |  |  |
2025 Convertible Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Repurchased Face Amount |  | 97,500 |  |  |  |  |  |  |  |  |  |  |
Interest Paid, Financing Activity |  | 670 |  |  |  |  |  |  |  |  |  |  |
Repayments of Debt |  | $ 1,170 |  |  |  |  |  |  |  |  |  |  |

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