CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Statement [Abstract]
Net sales	$ 1,686	$ 2,339	$ 4,854	$ 7,286
Cost of revenues	1,317	1,336	3,756	4,095
Gross profit	369	1,003	1,098	3,191
Operating expenses
Depreciation and amortization expense	110	53	213	154
Research and development	423	305	1,177	1,086
Selling, general and administrative	1,248	860	3,258	2,635
Total operating expenses	1,781	1,218	4,648	3,875
Operating loss	(1,412)	(215)	(3,550)	(684)
Other expenses
Interest expense, net	200	170	460	570
Loss on extinguishment of notes due to employees			158	0
Other (income) expenses, net	(7)	(72)	13	(111)
Total other expense, net	193	98	631	459
Loss before income taxes	(1,605)	(313)	(4,181)	(1,143)
Income tax provision (benefit)	0	(7)	4	(13)
Net loss	(1,605)	(306)	(4,185)	(1,130)
Preferred dividend	(22)	(23)	(68)	(69)
Net loss available to common stockholders	(1,627)	(329)	(4,253)	(1,199)
Condensed consolidated statements of comprehensive income (loss)
Net loss	(1,605)	(306)	(4,185)	(1,130)
Other comprehensive income (loss)
Foreign currency translation adjustments	(118)	177	41	232
Comprehensive loss	(1,723)	(129)	(4,144)	(898)
Loss per share
Net loss available to common stockholders	$ (1,627)	$ (329)	$ (4,253)	$ (1,199)
Basic and diluted loss per share	$ (0.06)	$ (0.02)	$ (0.17)	$ (0.06)
Weighted average basic and diluted shares outstanding	27,695,967	21,269,307	25,389,152	21,127,811