Note 7 - Share-based Compensation (Tables)

3 Months Ended

Mar. 31, 2020

Notes Tables

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

	Three Month s Ended
	March 31, 20 20
	Options			Weighted Avg. Exercise Price
Outstanding at beginning of period		1,570,455		$	1.96
Granted		—		$	—
Exercised		(251,180	)	$	1.84
Forfeited		—		$	—
Expired		—		$	—
Outstanding at March 31, 2020		1,319,275		$	1.98
Service vesting-based stock options exercisable at March 31, 2020		1,263,377		$	1.96

	Three Month s Ended March 31, 2020
	Options			Wtd. Avg. Exercise Price
Outstanding at beginning of period		737,497		$	1.64
Granted		—		$	—
Exercised		(17,113	)	$	1.64
Outstanding performance-based at March 31, 2020		720,384		$	1.64
Performance-based stock options exercisable at March 31, 2020		720,384		$	1.64

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

	Thr ee Months Ended March 31, 20 20
	Number of Restricted Shares			Grant-Date Fair Value
Unvested outstanding at beginning of period		429,399		$	13.25
Granted		175,971		$	9.43
Vested		(53 026	)	$	12.90
Forfeited		(7,000	)	$	15.92
Unvested outstanding at March 31, 2020		545,344		$	12.01

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

	Three Months Ended March 31,
(In thousands)	20 20		201 9
Research and development costs	$	174	$	67
Sales and marketing costs		229		154
General and administrative costs		577		278
Cost of product sales		133		32
Total	$	1,113	$	531