Note 12 - Fair Value of Financial Instrument - Fair Value and Carrying Value of Long-term Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Mar. 31, 2021
Reported Value Measurement [Member]
Long-term debt, including current portion	$ 113,624	$ 98,585
Estimate of Fair Value Measurement [Member]
Long-term debt, including current portion	$ 108,608	$ 97,226

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

No definition available.

Name:	us-gaap_LongTermDebtFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant