Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Statement [Abstract]
Sales	$ 130	$ 4,388	$ 413	$ 4,808
Cost of sales	83	4,063	163	4,454
Gross profit	47	325	250	354
Operating expenses
General and administrative	1,102	1,461	2,532	2,858
Consulting	58	77	102	154
Research and development		103		148
Total operating expenses, net	1,160	1,641	2,634	3,160
Loss from operations	(1,113)	(1,316)	(2,384)	(2,806)
Other income:
Interest income, net	7	2	15	28
Other income (expense)	1	20	(4)	35
Total other income	8	22	11	63
Loss before income taxes	(1,105)	(1,294)	(2,373)	(2,743)
Net loss	$ (1,105)	$ (1,294)	$ (2,373)	$ (2,743)
Net loss per share to common stockholders:
Basic and diluted	$ (0.02)	$ (0.02)	$ (0.03)	$ (0.04)
Weighted shares used in the computation of net loss per share:
Basic and diluted	73,387,815	72,860,560	73,289,623	72,829,372