CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Revenues	$ 3,605	$ 6,300
Cost of sales:
Cost of sales	2,241	3,765
Depreciation expense	241	277
Total cost of sales	2,482	4,042
Gross profit	1,123	2,258
Operating expenses:
Selling, general and administrative	1,693	1,995
Depreciation and amortization	61	68
Total operating expenses	1,754	2,063
Operating income (loss)	(631)	195
Other income:
Interest (expense) income, net	(1)	7
Gain on sale of property, plant and equipment	0	15
Total other income (expense)	(1)	22
Income (loss) before income taxes	(632)	217
Income tax expense	5	5
Net income (loss)	$ (637)	$ 212
Net income (loss) per share:
Basic	$ (0.05)	$ .02
Fully diluted	$ (0.05)	$ 0.02
Weighted-average shares outstanding:
Basic	12,710	13,511
Fully diluted	12,710	13,511