CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Income Statement [Abstract]
Revenues	$ 3,706	$ 5,609
Cost of sales:
Cost of sales	2,218	2,655
Depreciation expense	354	310
Total cost of sales	2,572	2,965
Gross profit	1,134	2,644
Operating expenses:
Selling, general and administrative	1,911	2,509
Depreciation and amortization	77	79
Total operating expenses	1,988	2,588
Operating (loss) income	(854)	56
Other income:
Interest income, net	9	13
Total other income	9	13
(Loss) income before income taxes	(845)	69
Income tax expense	(5)	(5)
Net (loss) income	$ (850)	$ 64
Net (loss) income per share:
Basic	$ (0.06)	$ 0.00
Fully diluted	$ (0.06)	$ 0.00
Weighted-average shares outstanding:
Basic	13,436	15,374
Fully diluted	13,436	15,374