CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenue	$ 44,247	$ 52,571	$ 88,929	$ 108,232
Costs of sales:
Contract	35,674	41,211	70,592	85,025
Cost of sales	35,674	41,211	70,592	85,025
Gross margin	8,573	11,360	18,337	23,207
Operating expenses:
Selling, general and administrative	9,059	9,020	17,623	17,620
Research and development	2,725	3,222	5,785	6,090
Amortization of identifiable intangible assets	242	242	483	483
Operating expenses	12,026	12,484	23,891	24,193
Operating loss	(3,453)	(1,124)	(5,554)	(986)
Other expense, net	(374)	(384)	(804)	(335)
Interest expense, net	(1,244)	(78)	(1,390)	(119)
Loss before benefit from income taxes	(5,071)	(1,586)	(7,748)	(1,440)
Benefit from income taxes	3,962	263	3,910	185
Net loss	$ (1,109)	$ (1,323)	$ (3,838)	$ (1,255)
Basic Loss per Share:
Net loss (in dollars per share)	$ (0.07)	$ (0.08)	$ (0.24)	$ (0.08)
Diluted Loss per Share:
Net loss (in dollars per share)	$ (0.07)	$ (0.08)	$ (0.24)	$ (0.08)
Weighted average shares outstanding
Basic (in shares)	16,290	16,330	16,085	15,993
Diluted (in shares)	16,290	16,330	16,085	15,993
Product
Revenue	$ 14,728	$ 20,883	$ 30,245	$ 47,207
Costs of sales:
Contract	11,412	15,339	22,653	34,779
Cost of sales	11,412	15,339	22,653	34,779
Service
Revenue	13,534	13,944	27,577	27,140
Costs of sales:
Contract	9,876	10,205	19,903	19,752
Cost of sales	9,876	10,205	19,903	19,752
Contract
Revenue	15,985	17,744	31,107	33,885
Costs of sales:
Contract	14,386	15,667	28,036	30,494
Cost of sales	$ 14,386	$ 15,667	$ 28,036	$ 30,494