CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Statement [Abstract]
Sales	$ 11,475	$ 9,799	$ 21,391	$ 18,188
Cost of sales	5,198	4,757	10,124	8,920
Gross profit	6,277	5,042	11,267	9,268
Other costs and expenses:
Research and development	816	696	1,378	1,405
Professional services	681	480	1,187	870
Salaries and related costs	2,118	2,243	4,234	4,703
Selling, general and administrative	2,929	2,929	5,599	5,333
Total other costs and expenses	6,544	6,348	12,398	12,311
Loss from operations	(267)	(1,306)	(1,131)	(3,043)
Interest expense, net	(38)	(36)	(72)	(67)
Change in fair value of derivative liabilities	46	38	20	126
Total other income (expense), net	8	2	(52)	59
Loss before income taxes	(259)	(1,304)	(1,183)	(2,984)
Income tax expense	13	4	24	9
Net loss	$ (272)	$ (1,308)	$ (1,207)	$ (2,993)
Loss per share
Basic (in dollars per share)	$ (0.01)	$ (0.04)	$ (0.04)	$ (0.10)
Diluted (in dollars per share)	$ (0.01)	$ (0.04)	$ (0.04)	$ (0.10)
Weighted average number of shares outstanding - basic (in shares)	32,890	30,860	32,884	30,860
Weighted average number of shares outstanding - dilutive (in shares)	32,890	30,860	32,884	30,860