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Note 8 - Earnings (Loss) Per Share - Antidilutive Securities Excluded From Computation of Earnings Per Share (Details) - shares
shares in Thousands
3 Months Ended 9 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Stock awards excluded from diluted EPS (in shares) 972 11 355 32
Assumed Conversion of Convertible Debt [Member]        
Stock awards excluded from diluted EPS (in shares) 608 318
Stock Awards that were Antidilutive [Member]        
Stock awards excluded from diluted EPS (in shares) 343 1 22 23
Stock Awards Subject to Performance Conditions [Member]        
Stock awards excluded from diluted EPS (in shares) 21 10 15 9