CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Income Statement [Abstract]
Revenues	$ 18,915	$ 16,175
Cost of sales:
Cost of sales	11,013	9,803
Depreciation expense	1,105	1,590
Total cost of sales	12,118	11,393
Gross profit	6,797	4,782
Operating expenses:
Selling, general and administrative	8,926	7,818
Asset impairment	396	1,890
Depreciation and amortization	276	282
Total operating expenses	9,598	9,990
Operating loss	(2,801)	(5,208)
Other income:
Interest income, net	12	35
Gain on sale of assets	7	439
Total other income	19	474
Loss before income taxes	(2,782)	(4,734)
Income tax (benefit) expense	(8)	8
Net loss	$ (2,774)	$ (4,742)
Net loss per share:
Basic	$ (0.21)	$ (0.35)
Fully diluted	$ (0.21)	$ (0.35)
Weighted-average shares outstanding:
Basic	13,386	13,553
Fully diluted	13,386	13,553