Condensed Consolidated Statements of Operations (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Revenue:
Product revenue	$ 16,007	$ 19,467
Service revenue	2,875	2,718
Total revenue	18,882	22,185
Cost of Revenue:
Cost of product	7,595	9,617
Cost of services	1,484	1,024
Total cost of revenue	9,079	10,641
Gross profit	9,803	11,544
Operating expenses:
Product development and engineering	5,344	5,125
Selling, general and administrative	8,017	7,736
Total operating expenses	13,361	12,861
Operating loss	(3,558)	(1,317)
Interest expense	0	(14)
Other (expense) income, net	(277)	81
Loss from continuing operations before provision for income taxes	(3,835)	(1,250)
Provision for income taxes	61	50
Loss from continuing operations	(3,896)	(1,300)
Income from discontinued operations, net of income taxes of $138 in 2015	0	232
Net loss	$ (3,896)	$ (1,068)
Net income (loss) per share — basic
From continuing operations (usd per share)	$ (0.56)	$ (0.18)
From discontinued operations (usd per share)	0.00	0.03
Net loss per share — basic (in usd per share)	(0.56)	(0.15)
Net income (loss) per share — diluted
From continuing operations (usd per share)	(0.56)	(0.18)
From discontinued operations (usd per share)	0.00	0.03
Net loss per share — diluted (in usd per share)	$ (0.56)	$ (0.15)
Weighted average number of shares:
Basic (in shares)	6,981	7,131
Diluted (in shares)	6,981	7,131