CONSOLIDATED STATEMENTS OF OPERATIONS - 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]
Sales	$ 9,799	$ 9,295	$ 18,188	$ 17,070
Cost of sales	4,757	4,595	8,920	9,048
Gross profit	5,042	4,700	9,268	8,022
Other costs and expenses:
Research and development	696	592	1,405	1,259
Professional services	480	396	870	753
Salaries and related costs	2,243	2,200	4,703	4,300
Selling, general and administrative	2,929	2,022	5,333	4,213
Total other costs and expenses	6,348	5,210	12,311	10,525
Loss from operations	(1,306)	(510)	(3,043)	(2,503)
Interest expense, net	(36)	(50)	(67)	(88)
Change in fair value of derivative liabilities	38	41	126	128
Total other income (loss), net	2	(9)	59	40
Loss before income taxes	(1,304)	(519)	(2,984)	(2,463)
Income tax expense	4	0	9	0
Net loss	$ (1,308)	$ (519)	$ (2,993)	$ (2,463)
Loss per share
Basic (in dollars per share)	$ (0.04)	$ (0.02)	$ (0.10)	$ (0.09)
Diluted (in dollars per share)	$ (0.04)	$ (0.02)	$ (0.10)	$ (0.09)
Weighted average number of shares outstanding - basic (in shares)	30,860	27,051	30,860	27,051
Weighted average number of shares outstanding - dilutive (in shares)	30,860	27,051	30,860	27,051