CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Net revenues:
Product	$ 100,271	$ 94,397
Service	49,070	46,754
Contract	80,312	87,852
Revenue, net	229,653	229,003
Costs of sales:
Product	73,976	68,223
Service	35,647	33,875
Contract	73,830	81,848
Cost of goods and services sold	183,453	183,946
Gross margin	46,200	45,057
Operating expenses:
Selling, general and administrative	31,440	27,374
Research and development	11,581	10,067
Amortization of identifiable intangible assets	966	987
Operating expenses	43,987	38,428
Operating income from continuing operations	2,213	6,629
Other income (expense), net	1,316	(800)
Interest income (expense)	121	(308)
Income from continuing operations before provision for income taxes	3,650	5,521
Provision for income taxes	(1,147)	(1,500)
Income from continuing operations	2,503	4,021
Discontinued operations
Loss on discontinued operations (net of tax)	(720)	(4,912)
Net income (loss)	$ 1,783	$ (891)
Basic Earnings per Share:
Income from continuing operations (in dollars per share)	$ 0.16	$ 0.26
Loss from discontinued operations (in dollars per share)	(0.05)	(0.32)
Net income (loss) (in dollars per share)	0.11	(0.06)
Diluted Earnings per Share:
Income from continuing operations (in dollars per share)	0.16	0.26
Loss from discontinued operations (in dollars per share)	(0.05)	(0.32)
Net income (loss) (in dollars per share)	$ 0.11	$ (0.06)
Weighted average shares outstanding
Basic (in shares)	15,675	15,562
Diluted (in shares)	15,738	15,666