Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities:
Net loss	$ (3,842)	$ (15,576)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	511	599
Stock-based compensation expense	304	841
Gain on sale of DuraFit business	(805)	0
Gain on change in fair value of liability-classified warrants	(404)	(883)
Amortization of debt discount	194	12,410
Gain on change in fair value of bifurcated derivative liability	0	(2,754)
Loss (gain) on foreign currency transactions	92	(813)
Amortization of debt discount	0	398
Other	8	(20)
Changes in operating assets and liabilities:
Accounts receivable	1,795	(1,583)
Inventories	1,169	(666)
Prepaid expenses and other assets	23	170
Accounts payable, accrued expenses and other current liabilities	(3,772)	3,929
Income taxes payable	0	(102)
Net cash used in operating activities	(4,727)	(4,050)
Cash flows from investing activities:
Purchases of property and equipment	0	(116)
Proceeds from sale of DuraFit business	3,337	0
Proceeds from sale of property and equipment	0	130
Net cash provided by investing activities	3,337	14
Cash flows from financing activities:
Net payments under demand line of credit	(1,458)	(201)
Payments of shareholder notes payable	(2,000)	0
Proceeds from exercise of stock options	42	0
Proceeds from issuance of debt	0	3,750
Proceeds from exercise of warrants	122	247
Net cash (used in) provided by financing activities	(3,294)	3,796
Effect of exchange rates on cash	186	(20)
Net change in cash	(4,498)	(260)
Cash at beginning of period	7,839	2,958
Cash at end of period	$ 3,341	$ 2,698