Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Operating activities:
Net loss	$ (2,661)	$ (2,098)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation of property and equipment	22	21
Amortization of license and supply agreement	101	157
Non-cash stock-based compensation, including stock options and restricted stock	588	508
Loss on extinguishment of debt	199
Amortization of debt discount	34	84
Inventory reserve	65
Provision for bad debt expense	21
Loss on disposal of equipment	10
(Gain) loss on foreign currency transactions	(1)	16
(Increase) decrease in operating assets:
Accounts receivable	(684)	(341)
Inventory	(850)	(102)
Prepaid expenses and other current assets	22	10
Increase (decrease) in operating liabilities:
Accounts payable	(309)	(166)
Accrued expenses	309	105
Deferred revenue		(53)
Net cash used in operating activities	(3,134)	(1,871)
Financing activities:
Proceeds from issuance of common stock, net of equity issuance costs of $19 and $152, respectively	3,778	1,179
Net (payments) proceeds on secured revolving credit facility	(548)	563
Proceeds from sale of subsidiary preferred shares to noncontrolling interest	3,000
Payments on secured note payable	(99)
Proceeds from exercise of warrants	138
Proceeds from issuance of secured note	1,187
Repayment of unsecured long term note payable	(1,187)
Net cash provided by financing activities	6,269	1,742
Effect of exchange rates on cash	(7)	4
Net increase (decrease) in cash	3,128	(125)
Cash, beginning of period	2,194	275
Cash, end of period	5,322	150
Supplemental disclosure of cash flow information
Cash paid for interest	124	79
Cash paid for income taxes	$ 7	$ 6