Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net loss	$ (19,410)	$ (12,854)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	2,001	2,416
Amortization of debt discount	1,683	1,774
Issuance of common stock for services	352
Stock-based compensation	207	386
Change in provision for obsolete inventories	(94)	466
Change in provision for losses on accounts receivable	178	167
Loss on change in derivative liabilities	1,881	1,688
Other non-cash items	(121)	(121)
Changes in operating assets and liabilities:
Accounts receivable	(2,834)	(1,136)
Inventories	8,653	(1,233)
Prepaid expenses and other current assets	(1,519)	632
Other assets	42	(101)
Accounts payable	1,543	(3,259)
Accrued expenses and other current liabilities	2,046	2,032
Net cash used in operating activities	(5,392)	(9,143)
Cash flows from investing activities:
Purchase of property and equipment	(58)	(51)
Cash flows from financing activities:
Proceeds from issuance of debt	9,000	6,267
Repayment of debt	(1,207)	(1,583)
Net borrowings from (repayments of) revolving credit facility	(3,074)	1,646
Net cash provided by financing activities	4,719	6,330
Net decrease in cash	(731)	(2,864)
Cash, beginning of the period	1,350	5,097
Cash, end of the period	619	2,233
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid for interest	996	982
Cash paid for income taxes
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING TRANSACTIONS:
Issuance of common stock for prepaid expenses	648
Reduction of common stock and increase in additional paid-in capital for surrender of common stock	3
Issuance of warrants for debt discount and additional paid-in capital	1,481
Relief of stock subscription accrual through long-term debt		(3,200)
Issuance of new long-term debt as payment of existing prepaid stock subscription		3,200
Property and equipment acquired through the issuance of capital leases		$ 330