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Note 8 - Indebtedness (Tables)

12 Months Ended

Mar. 31, 2023

Notes Tables

Convertible Debt [Table Text Block]

		March 31, 2023				March 31, 2022
Principal outstanding		$	172,500			$	172,500
Unamortized debt issuance costs			(2,228	)			(3,135	)
Net carrying value		$	170,272			$	169,365

Interest Expense on Convertible Debt [Table Text Block]

		Year Ended March 31,
		2023				2022				2021
Coupon interest expense at 1.375%		$	2,372			$	2,372			$	2,372
Amortization of debt discounts and issuance costs			907				890				5,397
Total		$	3,279			$	3,262			$	7,769

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