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CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Net revenues:        
Product $ 21,444 $ 25,267 $ 43,528 $ 46,275
Service 11,804 12,100 23,508 22,474
Contract 19,410 21,561 40,927 45,397
Revenue, net 52,658 58,928 107,963 114,146
Costs of sales:        
Product 16,137 18,292 32,579 33,200
Service 8,219 8,754 16,818 16,592
Contract 17,857 20,189 37,512 42,663
Cost of goods and services sold 42,213 47,235 86,909 92,455
Gross margin 10,445 11,693 21,054 21,691
Operating expenses:        
Selling, general and administrative 7,058 6,845 14,600 13,505
Research and development 2,793 2,661 5,555 5,095
Amortization of identifiable intangible assets 242 249 483 498
Operating expenses 10,093 9,755 20,638 19,098
Operating income from continuing operations 352 1,938 416 2,593
Other (expense) income, net (210) 20 (280) (186)
Interest income (expense), net 3 (85) 32 (171)
Income from continuing operations before provision for income taxes 145 1,873 168 2,236
Provision for income taxes (45) (629) (53) (800)
Income from continuing operations 100 1,244 115 1,436
Discontinued operations        
Loss on discontinued operations (net of tax) (26) (1,143) (26) (1,720)
Net income (loss) $ 74 $ 101 $ 89 $ (284)
Basic Earnings per Share:        
Income from continuing operations (in dollars per share) $ 0.01 $ 0.08 $ 0.01 $ 0.09
Loss from discontinued operations (in dollars per share) 0 (0.07) 0 (0.11)
Net income (loss) (in dollars per share) 0 0.01 0.01 (0.02)
Diluted Earnings per Share:        
Income from continuing operations (in dollars per share) 0.01 0.08 0.01 0.09
Loss from discontinued operations (in dollars per share) 0 (0.07) 0 (0.11)
Net income (loss) (in dollars per share) $ 0 $ 0.01 $ 0.01 $ (0.02)
Weighted average shares outstanding        
Basic (in shares) 15,615 15,584 15,651 15,541
Diluted (in shares) 15,670 15,671 15,717 15,658