Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Condensed Consolidated Statements of Operations (Unaudited) [Abstract]
Revenues	$ 5,300	$ 3,463	$ 17,883	$ 10,213
Cost of goods sold	5,659	2,709	18,143	7,842
Gross profit (loss)	(359)	754	(260)	2,371
Selling, general and administrative expenses	3,835	2,419	10,598	8,102
Operating loss	(4,194)	(1,665)	(10,858)	(5,731)
Other income (expense):
Interest income	19	0	42	0
Interest expense	(9)	(2)	(40)	(5)
Other income	859	52	865	61
Other expense	(1)	(12)	(5)	(25)
Total other income (expense), net	868	38	862	31
Loss before income taxes	(3,326)	(1,627)	(9,996)	(5,700)
Income tax benefit	0	0	0	0
Loss from continuing operations	(3,326)	(1,627)	(9,996)	(5,700)
Loss from discontinued operations	0	0	(216)	0
Net loss	$ (3,326)	$ (1,627)	$ (10,212)	$ (5,700)
Basic loss per common share:
Continuing operations (in dollars per share)	$ (0.10)	$ (0.07)	$ (0.31)	$ (0.28)
Discontinued operations (in dollars per share)	0	0	(0.01)	0
Basic loss per common share (in dollars per share)	(0.10)	(0.07)	(0.32)	(0.28)
Diluted loss per common share:
Continuing operations (in dollars per share)	(0.10)	(0.07)	(0.31)	(0.28)
Discontinued operations (in dollars per share)	0	0	(0.01)	0
Diluted loss per common share (in dollars per share)	$ (0.10)	$ (0.07)	$ (0.32)	$ (0.28)
Weighted average number of shares outstanding:
Basic (in shares)	33,057,010	24,092,172	31,947,087	20,538,309
Diluted (in shares)	33,057,010	24,092,172	31,947,087	20,538,309