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Note L - Convertible Senior Notes (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

Convertible Debt [Table Text Block]

		December 31,
		2021
Principal		$	80,500
Unamortized debt issuance costs			(1,820	)
Net carrying amount		$	78,680

Interest Income and Interest Expense Disclosure [Table Text Block]

		Year ended December 31,
		2021				2020
Contractual interest expense		$	4,025			$	4,025
Amortization of debt issuance costs			826				831
Total interest cost		$	4,851			$	4,856
Effective interest rate			5.1	%			5.1	%

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