CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Sales	$ 93,617	$ 92,834
Cost of Sales	38,598	39,048
Gross Profit	55,019	53,786
Operating Expenses
Selling and marketing	26,753	28,271
General and administrative	13,224	11,073
Depreciation and amortization	4,749	4,343
Research and development	9,935	9,406
Total operating expenses	54,661	53,093
Income from operations	358	693
Other expense (income)
Interest income, net	(144)	(73)
Other expense, net	195	184
Income before income tax expense	307	582
Income tax expense	155	127
Net income	$ 152	$ 455
Net income per share - Basic (in dollars per share)	$ 0.01	$ 0.03
Net income per share - Diluted (in dollars per share)	$ 0.01	$ 0.03
Weighted average shares - Basic (in shares)	17,280,365	16,837,754
Weighted average shares - Diluted (in shares)	17,868,816	17,142,770
Product
Sales	$ 68,800	$ 70,581
Cost of Sales	26,128	26,884
Service
Sales	24,817	22,253
Cost of Sales	$ 12,470	$ 12,164