Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenue	$ 130,457	$ 114,610	$ 105,555
Cost of revenue	61,431	28,747	31,280
Gross profit	69,026	85,863	74,275
Operating expenses:
Research & development	23,431	16,665	18,190
Selling, general & administrative	60,063	34,950	34,336
Goodwill impairment charge	42,520	0	0
Change in fair value of contingent consideration	(28,666)	0	0
Total operating expenses	97,348	51,615	52,526
Income (loss) from operations	(28,322)	34,248	21,749
Interest and other (expense) income, net	(302)	1,873	1,458
Income before income taxes	(28,624)	36,121	23,207
Provision (benefit) for income taxes	(4,642)	8,928	4,485
Net income (loss)	$ (23,982)	$ 27,193	$ 18,722
Net income (loss) per share:
Basic (in dollars per share)	$ (1.69)	$ 1.93	$ 1.30
Diluted (in dollars per share)	$ (1.69)	$ 1.89	$ 1.27
Weighted average common shares outstanding:
Basic (in shares)	14,222,163	14,120,584	14,441,536
Diluted (in shares)	14,222,163	14,373,783	14,689,041
Net income (loss)	$ (23,982)	$ 27,193	$ 18,722
Foreign currency translation adjustment	1,356	(372)	(742)
Comprehensive income (loss)	(22,626)	26,821	17,980
Product [Member]
Revenue	130,457	114,512	105,531
Service [Member]
Revenue	$ 0	$ 98	$ 24