CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Income Statement [Abstract]
Revenues	$ 5,609	$ 4,355
Cost of sales:
Cost of sales	2,655	2,599
Depreciation expense	310	322
Total cost of sales	2,965	2,921
Gross profit	2,644	1,434
Operating expenses:
Selling, general and administrative	2,509	2,788
Depreciation and amortization	79	106
Total operating expenses	2,588	2,894
Operating income (loss)	56	(1,460)
Other income (expense):
Interest income (expense), net	13	(54)
Gain on sale of assets	0	1,070
Total other income	13	1,016
Income (loss) before income taxes	69	(444)
Income tax expense	(5)	(6)
Net income (loss)	$ 64	$ (450)
Net income (loss) per share:
Basic	$ 0.00	$ (.03)
Fully diluted	$ 0.00	$ (.03)
Weighted-average shares outstanding:
Basic	15,374	15,552
Fully diluted	15,374	15,552