CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Statement [Abstract]
Revenues	$ 3,470	$ 9,165	$ 14,458	$ 19,489
Cost of sales:
Cost of sales	2,103	5,498	7,151	11,835
Depreciation expense	333	370	966	982
Total cost of sales	2,436	5,868	8,117	12,817
Gross profit	1,034	3,297	6,341	6,672
Operating expenses:
Selling, general and administrative	2,264	2,210	6,995	7,376
Depreciation and amortization	79	113	238	313
Total operating expenses	2,343	2,323	7,233	7,689
Operating income (loss)	(1,309)	974	(892)	(1,017)
Other income (expense):
Interest income (expense), net	21	10	46	(51)
Equity in net income of joint venture	0	0	94	0
Gain on sale of assets	559	0	574	1,070
Total other income (expense)	580	10	714	1,019
Income (loss) before income taxes	(729)	984	(178)	2
Income tax expense	(5)	(5)	(15)	(16)
Net income (loss)	$ (734)	$ 979	$ (193)	$ (14)
Net income (loss) per share:
Basic	$ (0.05)	$ 0.06	$ (0.01)	$ 0.00
Fully diluted	$ (0.05)	$ 0.06	$ (0.01)	$ 0.00
Weighted-average shares outstanding:
Basic	14,695	15,493	15,074	15,534
Fully diluted	14,695	15,493	15,074	15,534