CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Sales
Product	$ 62,380	$ 59,312
Service	19,182	16,436
Total sales	81,562	75,748
Cost of Sales
Product	27,058	23,996
Service	10,755	9,081
Total cost of sales (exclusive of depreciation and amortization, shown separately below)	37,813	33,077
Gross Profit	43,749	42,671
Operating Expenses:
Selling and marketing	22,872	17,903
General and administrative	10,699	10,150
Depreciation and amortization	3,718	3,086
Research and development	8,466	7,202
Total operating expenses	45,755	38,341
(Loss) income from operations	(2,006)	4,330
Other (income) expense
Interest income, net	(82)	(44)
Other expense, net	8	751
(Loss) income before income tax (benefit) expense	(1,932)	3,623
Income tax (benefit) expense	(471)	543
Net (loss) income	$ (1,461)	$ 3,080
Net (loss) income per share - Basic (in dollars per share)	$ (0.09)	$ 0.19
Net (loss) income per share - Diluted (in dollars per share)	$ (0.09)	$ 0.19
Weighted average shares - Basic (in shares)	16,684,164	16,609,084
Weighted average shares - Diluted (in shares)	16,684,164	16,638,458