Note 15 - Share-based Compensation (Tables)

6 Months Ended

Jun. 30, 2021

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 at January 1, 2021		276		$	10.29	​	$	5.41		2.67	$	54
Exercised		(2	)	$	6.00	—	$0.40			​		7
Forfeited		(3	)	$	10.40		$5.64			​		1
Outstanding, June 30, 2021		271		$	10.32		$	5.44		2.19		46
Exercisable, June 30, 2021		271		$	10.32					2.19		46
Vested and expected to vest		271		$	10.33					2.19		46

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, 2021		1,325		​		$	14.97	$	11,279
Granted		1,716		​			10.14		2,897
Released		(304	)	$	9.39		18.46		2,856
Cancelled/Forfeited		(57	)				13.34		485
Outstanding, June 30, 2021		2,680		​			11.51		22,700
Vested and expected to vest		2,680		​			11.51		22,700

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

	Three months ended				Six months ended
	June 30,				June 30,
	2021		2020		2021		2020
Share-based compensation - by expense type
Cost of goods sold	$	266	$	237	$	467	$	483
Research and development		630		704		1,193		1,392
Sales and marketing		329		295		548		586
General and administrative		2,048		2,066		3,585		4,079
Total share-based compensation expense	$	3,273	$	3,302	$	5,793	$	6,540