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Note 8 - Earnings Per Share - Antidilutive Securities Excluded From Computation of Earnings Per Share (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Stock awards excluded from diluted EPS (in shares)	659	692	656	676
Assumed Conversion of Convertible Debt [Member]
Stock awards excluded from diluted EPS (in shares)	608	608	608	608
Stock Awards that were Antidilutive [Member]
Stock awards excluded from diluted EPS (in shares)	43	63	40	49
Stock Awards Subject to Performance Conditions [Member]
Stock awards excluded from diluted EPS (in shares)	8	21	8	19

X

- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257

+ Details

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