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Note 10 - Indebtedness (Tables)

12 Months Ended

Mar. 31, 2021

Notes Tables

Convertible Debt [Table Text Block]

		*March 31, 2021*				*March 31, 2020*
Principal outstanding		$	172,500			$	172,500
Unamortized debt discount			(23,497	)			(28,205	)
Unamortized debt issuance costs			(3,328	)			(4,017	)
Net carrying value		$	145,675			$	140,278

		*March 31, 2021*				*March 31, 2020*
Amount allocated to conversion option		$	31,073			$	31,073
Less: allocated issuance costs and deferred taxes			(8,338	)			(8,338	)
Equity component, net		$	22,735			$	22,735

Interest Expense on Convertible Debt [Table Text Block]

		*Year Ended March 31,*
		*2021*				*2020*
Coupon interest expense at 1.375%		$	2,372			$	1,502
Amortization of debt discounts and issuance costs			5,397				3,314
Total		$	7,769			$	4,816