CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenue
Total revenue	$ 254,570	$ 212,280	$ 193,291
Cost of goods sold
Total cost of goods sold	81,962	64,813	58,777
Gross profit	172,608	147,467	134,514
Operating costs
Sales and marketing	61,503	63,805	58,994
Research and development	42,463	32,197	23,119
General and administrative	43,897	41,589	37,400
Amortization / impairment of intangible assets	9,470	9,852	8,809
Total operating costs	157,333	147,443	128,322
Operating income	15,275	24	6,192
Interest income, net	747	1,265	1,431
Other income (expense), net	(527)	2,264	758
Income before income taxes	15,495	3,553	8,381
Provision (benefit) for income taxes	6,706	(293)	30,780
Net income (loss)	$ 8,789	$ 3,846	$ (22,399)
Net income (loss) per share
Basic (in dollars per share)	$ 0.22	$ 0.10	$ (0.56)
Diluted (in dollars per share)	$ 0.22	$ 0.10	$ (0.56)
Weighted average common shares outstanding
Basic (in shares)	40,050	39,932	39,802
Diluted (in shares)	40,136	40,046	39,802
Product and license
Revenue
Total revenue	$ 184,173	$ 152,977	$ 147,257
Cost of goods sold
Total cost of goods sold	63,393	50,706	48,333
Services and other
Revenue
Total revenue	70,397	59,303	46,034
Cost of goods sold
Total cost of goods sold	$ 18,569	$ 14,107	$ 10,444