Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Total revenues	$ 24,744	$ 21,796	$ 69,837	$ 62,141
Cost of revenues	16,482	14,356	47,363	40,793
Gross profit	8,262	7,440	22,474	21,348
Operating expenses:
Selling, general and administrative	8,499	8,212	26,944	25,480
Depreciation and amortization	535	521	1,618	1,636
Research and development	685	696	2,088	1,920
Provision (credit) for bad debt	24	30	(10)	(21)
Impairment of goodwill and intangible assets			1,263	3
Other operating expenses	3		3	9
Total operating expenses	9,746	9,459	31,906	29,027
Loss from operations	(1,484)	(2,019)	(9,432)	(7,679)
Other income (expense)	(61)	77	(39)	169
Interest expense	(132)	(137)	(370)	(374)
Loss before taxes	(1,677)	(2,079)	(9,841)	(7,884)
Income tax benefit	(143)	(177)	(280)	(560)
Net loss	$ (1,534)	$ (1,902)	$ (9,561)	$ (7,324)
Basic and diluted weighted average common shares outstanding (in shares)	28,527,234	20,991,534	28,507,286	20,969,735
Basic and diluted loss per common share (in dollars per share)	$ (0.05)	$ (0.09)	$ (0.34)	$ (0.35)