Note 15 - Share-based Compensation (Tables)

9 Months Ended

Sep. 30, 2020

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, 2020		281		$	10.22		$	5.32			$	573
Exercised		(2	)		—	—						—
Outstanding, September 30, 2020		279		$	10.25		$	5.36		2.89		418
Exercisable, September 30, 2020		279		$	10.25					2.89		418
Vested and expected to vest		279		$	10.25					2.89		418

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, 2020		770				$	25.18	$	9,143
Granted		1,185		​			11.42		13,536
Released		(465	)	$	11.77		21.17		5,472
Cancelled/Forfeited		(38	)				15.14		426
Outstanding, September 30, 2020		1,452		​			15.5		16,333
Vested and expected to vest		1,452		​			15.5		16,333

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

	Three months ended				Nine months ended
	September 30,				September 30,
	2020		2019		2020		2019
Share-based compensation - by expense type
Cost of goods sold	$	230	$	196	$	712	$	584
Research and development		706		647		2,098		1,943
Sales and marketing		298		275		884		824
General and administrative		2,031		1,860		6,110		5,588
Total share-based compensation expense	$	3,265	$	2,978	$	9,804	$	8,939