CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenue
Total revenue	$ 215,691	$ 253,484	$ 211,336
Cost of goods sold
Total cost of goods sold	63,439	81,962	64,813
Gross profit	152,252	171,522	146,523
Operating costs
Sales and marketing	60,856	61,503	63,805
Research and development	41,194	42,463	32,197
General and administrative	46,338	43,897	41,589
Amortization / impairment of intangible assets	9,122	9,470	9,852
Amortization of intangible assets	9,122	9,470
Total operating costs	157,510	157,333	147,443
Operating income (loss)	(5,258)	14,189	(920)
Interest income, net	404	747	1,265
Other income (expense), net	1,434	(527)	2,264
Income (loss) before income taxes	(3,420)	14,409	2,609
Provision for income taxes	2,035	6,545	(435)
Net income (loss)	$ (5,455)	$ 7,864	$ 3,044
Net income (loss) per share
Basic	$ (0.14)	$ 0.20	$ 0.08
Diluted	$ (0.14)	$ 0.20	$ 0.08
Weighted average common shares outstanding
Basic	40,035	40,050	39,932
Diluted	40,035	40,136	40,046
Product and license
Revenue
Total revenue	$ 132,986	$ 183,313	$ 152,054
Cost of goods sold
Total cost of goods sold	41,820	63,393	50,706
Services and other
Revenue
Total revenue	82,705	70,171	59,282
Cost of goods sold
Total cost of goods sold	$ 21,619	$ 18,569	$ 14,107