CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Statement [Abstract]
Revenues	$ 2,725	$ 5,269	$ 6,330	$ 11,568
Cost of sales:
Cost of sales	1,216	3,022	3,458	6,787
Depreciation expense	242	282	482	559
Total cost of sales	1,458	3,304	3,940	7,346
Gross profit	1,267	1,965	2,390	4,222
Operating expenses:
Selling, general and administrative	2,005	2,007	3,698	4,001
Depreciation and amortization	61	70	122	138
Asset impairment	4,490	0	4,490	0
Total operating expenses	6,556	2,077	8,310	4,139
Operating income (loss)	(5,289)	(112)	(5,920)	83
Other income:
Interest (expense) income, net	(1)	5	(2)	12
Gain on sale of property, plant and equipment	0	0	0	15
Total other income (expense)	(1)	5	(2)	27
Income (loss) before income taxes	(5,290)	(107)	(5,922)	110
Income tax expense	0	5	5	10
Net income (loss)	$ (5,290)	$ (112)	$ (5,927)	$ 100
Net income (loss) per share:
Basic	$ (0.42)	$ (0.01)	$ (0.47)	$ 0.01
Fully diluted	$ (0.42)	$ (0.01)	$ (0.47)	$ 0.01
Weighted-average shares outstanding:
Basic	12,492	13,412	12,601	13,461
Fully diluted	12,492	13,412	12,601	13,461