CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Net revenues:
Net revenues	$ 52,571	$ 62,261	$ 108,232	$ 128,126
Costs of sales:
Cost of sales	41,211	47,695	85,025	98,489
Gross margin	11,360	14,566	23,207	29,637
Operating expenses:
Selling, general and administrative	9,020	8,917	17,620	18,527
Research and development	3,222	2,653	6,090	5,632
Amortization of identifiable intangible assets	242	242	483	483
Operating expenses	12,484	11,812	24,193	24,642
Operating (loss) income from continuing operations	(1,124)	2,754	(986)	4,995
Other (expense) income , net	(384)	54	(335)	(194)
Interest expense, net	(78)	(13)	(119)	(45)
(Loss) income from continuing operations before provision for income taxes	(1,586)	2,795	(1,440)	4,756
Benefit from / (provision for) income taxes	263	(818)	185	(1,515)
(Loss) income from continuing operations	(1,323)	1,977	(1,255)	3,241
Discontinued operations
Income from discontinued operations (net of tax)	0	0	0	183
Net (loss) income	$ (1,323)	$ 1,977	$ (1,255)	$ 3,424
Basic (Loss) Earnings per Share:
(Loss) Income from continuing operations (in dollars per share)	$ (0.08)	$ 0.12	$ (0.08)	$ 0.20
Income from discontinued operations (in dollars per share)	0.00	0.00	0.00	0.01
Net (Loss) income (in dollars per share)	(0.08)	0.12	(0.08)	0.21
Diluted (Loss) Earnings per Share:
(Loss) Income from continuing operations (in dollars per share)	(0.08)	0.12	(0.08)	0.20
Income from discontinued operations (in dollars per share)	0.00	0.00	0.00	0.01
Net (loss) income (in dollars per share)	$ (0.08)	$ 0.12	$ (0.08)	$ 0.21
Weighted average shares outstanding
Basic (in shares)	16,330	15,919	15,993	15,893
Diluted (in shares)	16,330	16,179	15,993	16,146
Product [Member]
Net revenues:
Net revenues	$ 20,883	$ 32,682	$ 47,207	$ 69,888
Costs of sales:
Cost of sales	15,339	24,389	34,779	51,961
Service [Member]
Net revenues:
Net revenues	13,944	15,034	27,140	29,377
Costs of sales:
Cost of sales	10,205	10,397	19,752	20,872
Contract [Member]
Net revenues:
Net revenues	17,744	14,545	33,885	28,861
Costs of sales:
Cost of sales	$ 15,667	$ 12,909	$ 30,494	$ 25,656