CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited Consolidated Condensed) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenue:
Total revenue	$ 3,069	$ 4,022	$ 10,118	$ 11,036
Operating expense:
Cost of good sold	2,506	2,965	7,839	8,164
Gross profit	563	1,057	2,279	2,872
Research and development expense	488	416	1,450	1,513
Selling, general and administrative expense	890	765	2,711	2,299
Loss from operations	(815)	(124)	(1,882)	(940)
Interest expense	47	12	140	32
Loss before provision for income taxes	(862)	(136)	(2,022)	(972)
Net loss	$ (862)	$ (136)	$ (2,022)	$ (972)
Net loss per basic shares (in dollars per share)	$ (0.02)	$ 0.00	$ (0.06)	$ (0.03)
Weighted average number of basic common shares outstanding (in shares)	38,136,792	33,879,097	36,077,257	33,858,184
Net loss per diluted share (in dollars per share)	$ (0.02)	$ 0.00	$ (0.06)	$ (0.03)
Weighted average number of diluted common shares outstanding (in shares)	38,136,792	33,879,097	36,077,257	33,858,184
Product Revenue [Member]
Revenue:
Total revenue	$ 3,043	$ 3,998	$ 9,797	$ 10,908
Other Revenue [Member]
Revenue:
Total revenue	$ 26	$ 24	$ 321	$ 128