CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Sales	$ 82,110	$ 60,564	$ 158,441	$ 140,079
Cost of Sales	36,628	31,668	72,552	67,310
Gross Profit	45,482	28,896	85,889	72,769
Operating Expenses
Selling, general and administrative	33,594	30,036	66,942	66,360
Research and development	11,760	10,186	23,733	20,601
Restructuring costs	779	636	2,303	14,324
Total operating expenses	46,133	40,858	92,978	101,285
Loss from operations	(651)	(11,962)	(7,089)	(28,516)
Other (income) expense
Interest expense, net	39	212	49	246
Other expense (income), net	883	117	(732)	590
Loss before income tax benefit	(1,573)	(12,291)	(6,406)	(29,352)
Income tax benefit	(397)	(3,359)	(2,009)	(5,597)
Net loss	$ (1,176)	$ (8,932)	$ (4,397)	$ (23,755)
Net loss per share - Basic (in dollars per share)	$ (0.06)	$ (0.50)	$ (0.24)	$ (1.34)
Net loss per share - Diluted (in dollars per share)	$ (0.06)	$ (0.50)	$ (0.24)	$ (1.34)
Weighted average shares - Basic (in shares)	18,161,110	17,747,739	18,133,368	17,710,014
Weighted average shares - Diluted (in shares)	18,161,110	17,747,739	18,133,368	17,710,014
Product
Sales	$ 60,275	$ 42,259	$ 114,910	$ 98,784
Cost of Sales	25,455	21,333	50,259	44,399
Service
Sales	21,835	18,305	43,531	41,295
Cost of Sales	$ 11,173	$ 10,335	$ 22,293	$ 22,911