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Note 8 - Indebtedness (Details Textual) $ / shares in Units, $ in Thousands |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Apr. 05, 2024 USD ($) | Aug. 12, 2019 USD ($) $ / shares | Mar. 31, 2025 USD ($) | Mar. 31, 2024 USD ($) | Mar. 31, 2023 USD ($) | Oct. 05, 2023 USD ($) | Mar. 05, 2021 USD ($)
Long-Term Debt |  |  | $ 71,250 |  |  |  |
Repayments of Debt |  |  | 44,251 | $ 33,500 | $ 36,000 |  |
Gain (Loss) on Extinguishment of Debt |  |  | 2,887 | (0) | $ (0) |  |
The Credit Facility Term Loan [Member] |  |  |  |  |  |  |
Payments of Financing Costs |  |  | 1,987 |  |  |  |
Debt Issuance Costs, Net |  |  | 1,203 | $ 321 |  |  |
Senior Secured Credit Agreement [Member] |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Effective Percentage |  |  |  | 7.20% |  |  |
Long-Term Debt |  |  | 10,000 |  |  |  |
Line of Credit Facility, Remaining Borrowing Capacity |  |  | 115,000 |  |  |  |
Line of Credit Facility, Commitment Fee Amount |  |  | 269 | $ 164 |  |  |
Senior Secured Credit Agreement [Member] | The Credit Facility Term Loan [Member] |  |  |  |  |  |  |
Payments of Financing Costs |  |  | $ 745 |  |  |  |
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] | The Credit Facility Term Loan [Member] |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  | $ 125,000 | $ 75,000
Senior Secured Credit Agreement [Member] | Minimum [Member] |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  | 1.50% |  |  |
Fixed Charge Coverage Ratio | 1.25 |  |  |  |  |  |
Senior Leverage Ratio | 3.5 |  |  |  |  |  |
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage |  |  | 0.20% |  |  |  |
Senior Secured Credit Agreement [Member] | Minimum [Member] | The Credit Facility Term Loan [Member] |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  |  | 25,000
Senior Secured Credit Agreement [Member] | Swingline Loan [Member] | Maximum [Member] |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  |  | 5,000
The Credit Facility Term Loan [Member] |  |  |  |  |  |  |
Debt Instrument, Covenant, Maximum Total Leverage Ratio for the First Five Testing Dates | 4.5 |  |  |  |  |  |
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 |  |  |  |  |  |
Term Loan [Member] |  |  |  |  |  |  |
Long-Term Debt, Gross | $ 75,000 |  | $ 71,250 | $ 0 |  |  |
Debt Instrument, Periodic Payment, Principal |  |  | 3,750 |  |  |  |
The Notes [Member] | Senior Notes [Member] |  |  |  |  |  |  |
Debt Issuance Costs, Net |  |  | 203 | $ 1,302 |  |  |
Debt Instrument, Interest Rate, Effective Percentage |  |  |  | 1.90% |  |  |
Long-Term Debt, Gross |  |  | 97,500 | $ 172,500 |  |  |
Long-Term Debt |  |  | $ 97,297 | $ 171,198 |  |  |
Debt Instrument, Face Amount |  | $ 172,500 |  |  |  |  |
Proceeds from Convertible Debt |  | $ 167,056 |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 1.375% | 1.375% | 1.375% |  |  |
Debt Instrument, Convertible, Conversion Ratio Per 1,000 Principal |  | 3.5273 |  |  |  |  |
Debt Instrument, Convertible, Conversion Price (in dollars per share) | $ / shares |  | $ 283.5 |  |  |  |  |
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger |  | 130.00% |  |  |  |  |
Debt Instrument, Convertible, Threshold Trading Days |  | 20 |  |  |  |  |
Debt Instrument, Convertible, Threshold Consecutive Trading Days |  | 30 |  |  |  |  |
Debt Instrument, Convertible, Consecutive Trading Days, Trading Price Per 1,000 Principal of Notes Less Than 98% of the Product |  | 10 |  |  |  |  |
Debt Instrument, Unamortized Discount and Commissions Including Equity Component |  |  | $ 2,925 |  |  |  |
Third Party Offering Costs |  |  | 152 |  |  |  |
Outstanding 2025 Notes [Member] |  |  |  |  |  |  |
Long-Term Debt, Gross |  |  | 97,500 |  |  |  |
Debt Instrument, Repurchased Face Amount | 75,000 |  |  |  |  |  |
Repayments of Debt | 71,250 |  |  |  |  |  |
Interest Payable | 160 |  |  |  |  |  |
Payment for Debt Extinguishment or Debt Prepayment Cost | $ 310 |  |  |  |  |  |
Gain (Loss) on Extinguishment of Debt |  |  | 2,887 |  |  |  |
Revolving Credit Facility [Member] | Senior Secured Credit Agreement [Member] |  |  |  |  |  |  |
Payments of Financing Costs |  |  | $ 1,242 |  |  |  |
Revolving Credit Facility [Member] | Senior Secured Credit Agreement [Member] |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  |  | 75,000
Letter of Credit [Member] | Senior Secured Credit Agreement [Member] | Maximum [Member] |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  |  | $ 2,500

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