CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Sales	$ 60,564	$ 93,491	$ 140,079	$ 187,108
Cost of Sales	31,668	42,751	67,310	83,349
Gross Profit	28,896	50,740	72,769	103,759
Operating Expenses
Selling, general and administrative	30,036	45,007	66,360	86,027
Research and development	10,186	10,626	20,601	22,267
Restructuring costs	636	0	14,324	0
Total operating expenses	40,858	55,633	101,285	108,294
Loss from operations	(11,962)	(4,893)	(28,516)	(4,535)
Other expense
Interest expense, net	212	240	246	96
Other expense, net	117	1,689	590	1,884
Loss before income tax benefit	(12,291)	(6,822)	(29,352)	(6,515)
Income tax benefit	(3,359)	(417)	(5,597)	(262)
Net loss	$ (8,932)	$ (6,405)	$ (23,755)	$ (6,253)
Net (loss) income per share - Basic (in dollars per share)	$ (0.50)	$ (0.37)	$ (1.34)	$ (0.36)
Net (loss) income per share - Diluted (in dollars per share)	$ (0.50)	$ (0.37)	$ (1.34)	$ (0.36)
Weighted average shares - Basic (in shares)	17,747,739	17,333,996	17,710,014	17,323,479
Weighted average shares - Diluted (in shares)	17,747,739	17,333,996	17,710,014	17,323,479
Product
Sales	$ 42,259	$ 71,045	$ 98,784	$ 142,622
Cost of Sales	21,333	30,505	44,399	58,456
Service
Sales	18,305	22,446	41,295	44,486
Cost of Sales	$ 10,335	$ 12,246	$ 22,911	$ 24,893