CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Income Statement [Abstract]
Revenues	$ 16,175	$ 19,478
Cost of sales:
Cost of sales	9,803	9,854
Depreciation expense	1,590	1,077
Total cost of sales	11,393	10,931
Gross profit	4,782	8,547
Operating expenses:
Selling, general and administrative	7,818	9,113
Asset impairment	1,890	0
Depreciation and amortization	282	271
Total operating expenses	9,990	9,384
Operating loss	(5,208)	(837)
Other income:
Interest income, net	35	56
Gain on sale of assets	439	576
Equity in net income of joint venture and other income	0	94
Total other income	474	726
Loss before income taxes	(4,734)	(111)
Income tax expense	(8)	(5)
Net loss	$ (4,742)	$ (116)
Net loss per share:
Basic	$ (0.35)	$ (0.01)
Fully diluted	$ (0.35)	$ (0.01)
Weighted-average shares outstanding:
Basic	13,553	14,233
Fully diluted	13,553	14,233