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Note 16 - Commitments and Contingencies (Details Textual) - USD ($) $ in Thousands	Sep. 30, 2021	Mar. 31, 2021	Mar. 31, 2020
Restricted Cash and Cash Equivalents, Noncurrent, Total	$ 6,165	$ 5,568	$ 5,600
Restricted Cash and Cash Equivalents, Current, Total	2,300	$ 2,200
Letter of Credit [Member]
Escrow Deposit	$ 5,000

X

- Definition

The designation of funds furnished by a borrower to a lender to assure future payments of the borrower's real estate taxes and insurance obligations with respect to a mortgaged property. Escrow deposits may be made for a variety of other purposes such as earnest money and contingent payments. This element excludes replacement reserves which are an escrow separately provided for within the US GAAP taxonomy.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.10)
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-SubTopic 440
-Section 50
-Paragraph 1
-Subparagraph (d)
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X

- Definition

Amount of cash and cash equivalents restricted as to withdrawal or usage, classified as current. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

+ References

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-Paragraph 1
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-Section S99
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-SubTopic 10
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X

- Definition

Amount of cash and cash equivalents restricted as to withdrawal or usage, classified as noncurrent. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

+ References

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-SubTopic 10
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-Paragraph 4
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