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Note 7 - Indebtedness (Details Textual) - USD ($) $ in Thousands	Mar. 05, 2021	Aug. 12, 2019	Sep. 30, 2022	Mar. 31, 2022	Mar. 31, 2021
Long-Term Line of Credit, Total			$ 27,000	$ 49,000
Senior Secured Credit Agreement [Member]
Long-Term Line of Credit, Total			$ 27,000
Debt Instrument, Covenant, Maximum Total Leverage Ratio for the First Four Testing Dates	10
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%

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- Definition

Requirement for maximum estimated total leverage ratio under the debt agreement following an acquisition.

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Requirement for maximum total leverage ratio under the debt agreement for the fifth, sixth, seventh, and eighth testing dates.

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Requirement for maximum total leverage ratio under the debt agreement for the first four testing dates.

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Actual fixed charge coverage ratio under the debt agreement.

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Face (par) amount of debt instrument at time of issuance.

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Contractual interest rate for funds borrowed, under the debt agreement.

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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.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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