Note 15 - Share-based Compensation (Tables)

9 Months Ended

Sep. 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		(4	)	$	10.46		$	5.64	​			1
Outstanding, September 30, 2021		270		$	10.32		$	5.44		1.94		6
Exercisable, September 30, 2021		270		$	10.32					1.94		6
Vested and expected to vest		270		$	10.33					1.94		6

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		1,732		​			10.12		16,007
Released		(590	)	$	8.59		15.87		5,069
Cancelled/Forfeited		(73	)				13.05		527
Outstanding, September 30, 2021		2,394		​			11.30		17,189
Vested and expected to vest		2,394		​			11.30		17,189

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

	Three months ended				Nine months ended
	September 30,				September 30,
	2021		2020		2021		2020
Share-based compensation - by expense type
Cost of goods sold	$	222	$	230	$	689	$	712
Research and development		489		706		1,682		2,098
Sales and marketing		272		298		820		884
General and administrative		2,146		2,031		5,731		6,110
Total share-based compensation expense	$	3,129	$	3,265	$	8,922	$	9,804