CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Sales	$ 79,169	$ 70,736	$ 237,610	$ 210,815
Cost of Sales	36,838	34,438	109,390	101,748
Gross Profit	42,331	36,298	128,220	109,067
Operating Expenses
Selling, general and administrative	33,433	30,163	100,375	96,523
Research and development	12,731	10,754	36,464	31,355
Restructuring costs	1,376	239	3,679	14,563
Total operating expenses	47,540	41,156	140,518	142,441
Loss from operations	(5,209)	(4,858)	(12,298)	(33,374)
Other (income) expense
Interest expense, net	5	161	54	407
Other expense (income), net	299	(256)	(433)	334
Loss before income tax benefit	(5,513)	(4,763)	(11,919)	(34,115)
Income tax benefit	(1,658)	(1,739)	(3,667)	(7,336)
Net loss	$ (3,855)	$ (3,024)	$ (8,252)	$ (26,779)
Net loss per share - Basic (in dollars per share)	$ (0.21)	$ (0.17)	$ (0.45)	$ (1.51)
Net loss per share - Diluted (in dollars per share)	$ (0.21)	$ (0.17)	$ (0.45)	$ (1.51)
Weighted average shares - Basic (in shares)	18,194,960	17,797,390	18,166,930	17,757,359
Weighted average shares - Diluted (in shares)	18,194,960	17,797,390	18,166,930	17,757,359
Product
Sales	$ 57,838	$ 48,082	$ 172,748	$ 146,866
Cost of Sales	25,650	22,413	75,909	66,812
Service
Sales	21,331	22,654	64,862	63,949
Cost of Sales	$ 11,188	$ 12,025	$ 33,481	$ 34,936