CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Net revenues:
Product	$ 25,802	$ 22,953	$ 47,488	$ 41,545
Service	15,929	14,920	30,031	29,170
Contract	21,561	19,529	45,397	43,228
Revenue, net	63,292	57,402	122,916	113,943
Costs of sales:
Product	18,172	15,815	33,013	28,718
Service	10,404	10,831	19,724	20,384
Contract	20,189	18,495	42,663	40,567
Cost of goods and services sold	48,765	45,141	95,400	89,669
Gross margin	14,527	12,261	27,516	24,274
Operating expenses:
Selling, general and administrative	9,253	9,513	18,317	18,776
Research and development	4,420	3,761	8,765	7,625
Amortization of identifiable intangible assets	249	0	498	0
Operating expenses	13,922	13,274	27,580	26,401
Operating income (loss)	605	(1,013)	(64)	(2,127)
Other (expense) income, net	(10)	406	(239)	328
Interest expense	(85)	(25)	(171)	(42)
Income (loss) before (provision for) benefit from income taxes	510	(632)	(474)	(1,841)
(Provision for) or benefit from income taxes	(409)	113	190	333
Net income (loss)	$ 101	$ (519)	$ (284)	$ (1,508)
Earnings (loss) per Share:
Basic (in dollars per share)	$ 0.01	$ (0.03)	$ (0.02)	$ (0.10)
Diluted (in dollars per share)	$ 0.01	$ (0.03)	$ (0.02)	$ (0.10)
Weighted average shares outstanding
Basic (in shares)	15,584	15,612	15,541	15,473
Diluted (in shares)	15,671	15,612	15,541	15,473