Note 7 - Share-based Compensation (Tables)

9 Months Ended

Sep. 30, 2020

Notes Tables

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

	Nine Month Period Ended
	September 30, 2020
				Wtd. Avg.
				Exercise
	Options			Price
Outstanding at beginning of year		1,570,455		$	1.96
Granted		—		$	—
Exercised		(511,680	)	$	1.95
Forfeited		—		$	—
Expired		—		$	—
Outstanding service vesting-based at September 30, 2020		1,058,775		$	1.96
Service vesting-based options exercisable at September 30, 2020		1,039,399		$	1.94

	Nine Month Period Ended
	September 30, 2020
				Wtd. Avg.
				Exercise
	Options			Price
Outstanding at beginning of year		737,497		$	1.64
Granted		—		$	—
Exercised		(17,113	)	$	1.64
Outstanding performance-based at September 30, 2020		720,384		$	1.64
Performance-based options exercisable at September 30, 2020		720,384		$	1.64

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

	Nine Month Period Ended
	September 30, 2020
Service vesting-based restricted stock	Number of Restricted Shares			Grant-Date Fair Value
Outstanding at beginning of year		429,399		$	13.25
Granted		448,267		$	15.78
Granted in lieu of cash		34,154		$	9.18
Vested		(161,263	)	$	11.12
Forfeited		(24,861	)	$	14.80
Outstanding at September 30, 2020		725,696		$	15.04

	Nine Month Period Ended
	September 30, 2020
Performance-based restricted stock	Number of Restricted Shares		Grant-Date Fair Value
Outstanding at beginning of year		—	$	—
Expected to vest		82,805	$	9.18
Vested		—	$	—
Forfeited		—	$	—
Outstanding at September 30, 2020		82,805	$	9.18

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

	Three Month Period Ended				Nine Month Period Ended
	September 30,				September 30,
(In thousands)	2020		2019		2020		2019
Research and development costs	$	291	$	165	$	687	$	400
Sales and marketing costs		256		182		581		507
General and administrative costs		868		429		2,144		1,145
Cost of product sales		145		53		406		127
Total	$	1,560	$	829	$	3,818	$	2,179