Note P - Share-based Compensation (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Share-based Payment Arrangement, Option, Activity [Table Text Block]

						Weighted				Weighted
				Weighted		Average				Average
				Average		Share Price		Weighted		Remaining		Aggregate
	Number of			Exercise		on Date of		Average		Contractual		Intrinsic
	shares			Price		Exercise		Fair Value		Life		Value
	(in thousands, except price data)
Outstanding, January 1, 2019		287		$	10.19			$	5.31			$	1,503
Exercised		(4	)		7.79	$	12.91		3.95				15
Forfeited		(2	)		12.20				6.08				2
Outstanding, December 31, 2019		281		$	10.21			$	5.32		3.87		573
Exercisable, December 31, 2019		281		$	10.21						3.87		573
Vested and expected to vest		281		$	10.21						3.87	$	573

Share-based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]

				Weighted
				Average Share		Weighted		Aggregate
	Number of			Price on Date		Average Fair		Intrinsic
	shares			of Release		Value		Value
	(in thousands, except price data)
Outstanding at January 1, 2019		826				$	32.07	$	12,744
Granted		445					13.30		6
Released		(452	)	$	25.95		25.95		6
Cancelled/Forfeited		(49	)				26.17		584
Outstanding, December 31, 2019		770					25.18		9,143
Vested and expected to vest		770				$	25.18	$	9,143

Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]

	2019		2018		2017
Cost of goods sold	$	772	$	795	$	461
Research and development		2,557		2,419		1,496
Sales and marketing		1,070		925		481
General and administrative		7,405		6,981		5,357
Total share-based compensation expense	$	11,804	$	11,120	$	7,795

	2019		2018		2017
Employee stock options	$	—	$	12	$	853
Restricted stock units		11,804		11,108		6,942
Total share-based compensation expense	$	11,804	$	11,120	$	7,795