CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Net revenues:
Product	$ 22,257	$ 20,142	$ 46,173	$ 40,312
Service	15,314	16,014	31,334	31,393
Contract	21,945	25,929	48,683	45,973
Revenue, net	59,516	62,085	126,190	117,678
Costs of sales:
Product	14,841	14,041	31,314	25,018
Service	10,904	11,473	22,456	22,038
Contract	20,312	24,584	45,791	43,567
Cost of goods and services sold	46,057	50,098	99,561	90,623
Gross margin	13,459	11,987	26,629	27,055
Operating expenses:
Selling, general and administrative	9,494	9,291	19,699	19,434
Research and development	3,706	3,089	7,846	6,638
Amortization of identifiable intangible assets	0	150	0	303
Operating expenses	13,200	12,530	27,545	26,375
Operating income (loss) from continuing operations	259	(543)	(916)	680
Other income (expense), net	255	(366)	221	207
Interest expense	(13)	(21)	(26)	(42)
Income (loss) from continuing operations before provision for income taxes	501	(930)	(721)	845
Provision (benefit) for income taxes	253	(419)	(600)	321
Income (loss) from continuing operations	248	(511)	(121)	524
Discontinued operations -
Income (loss) on discontinued operations (net of tax)	(191)	(10)	(206)	1,420
Net income (loss)	$ 57	$ (521)	$ (327)	$ 1,944
Basic earnings (loss) per share:
Income (loss) from continuing operations (in dollars per share)	$ 0.02	$ (0.03)	$ (0.01)	$ 0.03
Income (loss) from discontinued operations (in dollars per share)	$ (0.01)	$ 0.00	$ (0.01)	$ 0.09
Net income (loss) (in dollars per share)	$ 0.00	$ (0.03)	$ (0.02)	$ 0.13
Diluted earnings (loss) per share:
Income (loss) from continuing operations (in dollars per share)	$ 0.02	$ (0.03)	$ (0.01)	$ 0.03
Income (loss) from discontinued operations (in dollars per share)	$ (0.01)	$ 0.00	$ (0.01)	$ 0.09
Net income (loss) (in dollars per share)	$ 0.00	$ (0.03)	$ (0.02)	$ 0.13
Weighted average shares outstanding
Basic (in shares)	15,171	15,098	15,162	15,091
Diluted (in shares)	15,340	15,098	15,162	15,163