Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flow from operating activities:
Net loss	$ (1,913)	$ (2,601)
Loss from discontinued operations	0	(188)
Loss from continuing operations	(1,913)	(2,413)
Adjustments to reconcile net loss from continuing operation to net cash used in operating activities of continuing operations:
Depreciation and amortization	199	233
Stock and share-based compensation	260	293
Warrants issued to vendors	60	0
Loss on disposal of property	88	0
Change in fair value of derivative warrant and conversion liabilities	0	(1,099)
Loss on extinguishment of debt	0	1,680
Interest accreted	0	559
Deferred taxes	0	(397)
Other	4	0
Changes in operating assets and liabilities:
Accounts receivable	(279)	(205)
Inventories	(118)	(62)
Accounts payable and accrued expenses	(463)	(849)
Other	80	419
Net cash used in operating activities of continuing operations	(2,082)	(1,841)
Net cash used in operating activities of discontinued operations	0	(23)
Net cash used in operating activities	(2,082)	(1,864)
Cash flows from investing activities:
Purchases of property and equipment	(745)	(44)
Net cash used in investing activities of continuing operations	(745)	(44)
Net cash used in investing activities of discontinued operations	0	(88)
Net cash used in investing activities	(745)	(132)
Cash flows from financing activities:
Proceeds from warrant exercises	1,755	0
Payments of debt	(1)	(7,145)
Proceeds from issuance of debt, net of issuance costs	0	3,779
Proceeds from issuance of debt and warrants, net of issuance costs	0	5,518
Proceeds from issuance of preferred stock and warrants, net of issuance costs	0	1,747
Net cash provided by financing activities of continuing operations	1,754	3,899
Net cash provided by financing activities of discontinued operations	0	895
Net cash provided by financing activities	1,754	4,794
Effect of exchange rate changes on cash and cash equivalents of discontinued operations	0	141
Net change in cash and cash equivalents and restricted cash	(1,073)	2,939
Cash and cash equivalents and restricted cash, beginning of period
Cash and cash equivalents	6,203	342
Restricted cash	775	0
Cash and cash equivalents and restricted cash, beginning of period	6,978	342
Cash and cash equivalents and restricted cash, end of period
Cash and cash equivalents	5,130	3,281
Restricted cash	775	0
Cash and cash equivalents and restricted cash, end of period	5,905	3,281
Supplemental disclosures, continuing operations:
Cash paid for interest, continuing operations	$ 1	$ 623