CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Statement [Abstract]
Revenues	$ 5,379	$ 5,968	$ 10,987	$ 10,323
Cost of sales:
Cost of sales	2,393	3,737	5,047	6,337
Depreciation expense	323	290	633	612
Total cost of sales	2,716	4,027	5,680	6,949
Gross profit	2,663	1,941	5,307	3,374
Operating expenses:
Selling, general and administrative	2,223	2,378	4,732	5,166
Depreciation and amortization	79	94	158	200
Total operating expenses	2,302	2,472	4,890	5,366
Operating income (loss)	361	(531)	417	(1,992)
Other income (expense):
Interest income (expense), net	12	(6)	26	(61)
Equity in net income of joint venture	94	0	94	0
Gain on sale of assets	14	0	14	1,070
Total other income (expense)	120	(6)	134	1,009
Income (loss) before income taxes	481	(537)	551	(983)
Income tax expense	(5)	(5)	(10)	(10)
Net income (loss)	$ 476	$ (542)	$ 541	$ (993)
Net income (loss) per share:
Basic	$ .03	$ (.03)	$ .04	$ (.06)
Fully diluted	$ 0.03	$ (0.03)	$ 0.04	$ (0.06)
Weighted-average shares outstanding:
Basic	15,154	15,546	15,264	15,555
Fully diluted	15,154	15,546	15,264	15,555