CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Sales	$ 85,332	$ 79,169	$ 241,906	$ 237,610
Cost of sales	42,067	36,838	117,178	109,390
Gross profit	43,265	42,331	124,728	128,220
Operating expenses
Selling, general and administrative	37,226	33,433	108,734	100,375
Research and development	12,586	12,731	36,756	36,464
Restructuring costs	580	1,376	2,512	3,679
Total operating expenses	50,392	47,540	148,002	140,518
Loss from operations	(7,127)	(5,209)	(23,274)	(12,298)
Other (income) expense
Interest (income) expense, net	(24)	5	(28)	54
Other (income) expense, net	(1,428)	299	(3,077)	(433)
Loss before income tax expense (benefit)	(5,675)	(5,513)	(20,169)	(11,919)
Income tax expense (benefit)	586	(1,658)	4,352	(3,667)
Net loss	$ (6,261)	$ (3,855)	$ (24,521)	$ (8,252)
Net loss per share - Basic (in dollars per share)	$ (0.34)	$ (0.21)	$ (1.34)	$ (0.45)
Net loss per share - Diluted (in dollars per share)	$ (0.34)	$ (0.21)	$ (1.34)	$ (0.45)
Weighted average shares - Basic (in shares)	18,436,615	18,194,960	18,336,537	18,166,930
Weighted average shares - Diluted (in shares)	18,436,615	18,194,960	18,336,537	18,166,930
Product
Sales	$ 65,581	$ 57,838	$ 182,015	$ 172,748
Cost of sales	30,375	25,650	82,879	75,909
Service
Sales	19,751	21,331	59,891	64,862
Cost of sales	$ 11,692	$ 11,188	$ 34,299	$ 33,481