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Note 7 - Indebtedness (Tables)

9 Months Ended

Dec. 31, 2022

Notes Tables

Convertible Debt [Table Text Block]

		*December 31, 2022*				*March 31, 2022*
Principal outstanding		$	172,500			$	172,500
Unamortized debt issuance costs			(2,456	)			(3,135	)
Net carrying value		$	170,044			$	169,365

Interest Expense on Convertible Debt [Table Text Block]

		*Three Months Ended December 31,*								*Nine Months Ended December 31,*
		*2022*				*2021*				*2022*				*2021*
Coupon interest expense at 1.375%		$	593			$	593			$	1,779			$	1,779
Amortization of debt discounts and issuance costs			227				223				679				666
Total interest and amortization of debt issuance costs		$	820			$	816			$	2,458			$	2,445