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Note 7 - Indebtedness (Details Textual) - USD ($) $ in Thousands | Mar. 05, 2021 | Aug. 12, 2019 | Dec. 31, 2022 | Mar. 31, 2022 | Mar. 31, 2021
--- | --- | --- | --- | --- | ---
Long-Term Line of Credit, Total |  |  | $ 19,000 | $ 49,000 |
Senior Secured Credit Agreement [Member] |  |  |  |  |
Long-Term Line of Credit, Total |  |  | $ 19,000 |  |
Debt Instrument, Covenant, Maximum Total Leverage Ratio for the Sixth, Seventh, and Eighth Testing Dates | 5.0 |  |  |  |
Debt Instrument, Covenant, Maximum Conditional Total Leverage Ratio Following an Acquisition | 5.75 |  |  |  |
Senior Secured Credit Agreement [Member] | Minimum [Member] |  |  |  |  |
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage | 0.15% |  |  |  |
Fixed Charge Coverage Ratio | 1.25 |  |  |  |
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] | Maximum [Member] |  |  |  |  |
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 | $ 75,000 |  |  |  |
Senior Secured Credit Agreement [Member] | Swingline Loan [Member] |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | 5,000 |  |  |  |
Senior Secured Credit Agreement [Member] | Revolving Credit Facility [Member] |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | 75,000 |  |  |  |
Senior Secured Credit Agreement [Member] | Letter of Credit [Member] |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | $ 2,500 |  |  |  |
The Notes [Member] | Senior Notes [Member] |  |  |  |  |
Debt Instrument, Face Amount |  | $ 172,500 |  |  |
Proceeds from Convertible Debt |  | $ 167,056 |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 1.375% | 1.375% |  |
Debt Instrument, Interest Rate, Effective Percentage |  |  |  |  | 1.90%

X
- Definition Requirement for maximum estimated total leverage ratio under the debt agreement following an acquisition. + References No definition available. + Details
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- Definition Requirement for maximum total leverage ratio under the debt agreement for the fifth, sixth, seventh, and eighth testing dates. + References No definition available. + Details
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- Definition Actual fixed charge coverage ratio under the debt agreement. + References No definition available. + Details
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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1B -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=124435984&loc=d3e28551-108399 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI https://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124429444&loc=SL124452920-239629 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 55 -Paragraph 69C -URI https://asc.fasb.org/extlink&oid=123466577&loc=SL123495737-112612 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 55 -Paragraph 69B -URI https://asc.fasb.org/extlink&oid=123466577&loc=SL123495735-112612 + Details
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- Definition Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=123466204&loc=SL6036836-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=124435984&loc=d3e28551-108399 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124429444&loc=SL124452920-239629 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1B -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 + Details
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