CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited Consolidated Condensed) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenue:
Total revenue	$ 3,755	$ 2,898
Operating expense:
Cost of revenue	2,871	2,488
Gross profit	884	410
Research and development expense	477	558
Selling, general and administrative expense	877	765
Loss from operations	(470)	(913)
Interest expense	43	11
Loss before provision for income taxes	(513)	(924)
Net loss	$ (513)	$ (924)
Net loss per share-basic and diluted (in dollar per share)	$ (0.02)	$ (0.03)
Weighted average number of basic and diluted common shares outstanding (in shares)	33,911,792	33,847,793
Product Revenue [Member]
Revenue:
Total revenue	$ 3,497	$ 2,867
Other Revenue [Member]
Revenue:
Total revenue	$ 258	$ 31