Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net loss	$ (3,521,000)	$ (30,881,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	402,000	333,000
Stock based compensation expense	206,000	300,000
Amortization of debt discount	1,229,000	350,000
(Recovery of) reserve for excess and slow-moving inventories	125,000	(252,000)
Change in fair value of derivative obligation	0	(567,000)
Deferred income tax benefit		(3,451,000)
Loss on disposal of equipment	6,000	420,000
Impairment of intangible asset		27,202,000
Net change in operating assets and liabilities:
Accounts receivable	(1,582,000)	869,000
Inventories	449,000	(358,000)
Prepaid expenses and other assets	(165,000)	257,000
Accounts payable	749,000	(242,000)
Related party payable		(606,000)
Accrued payroll and related expenses	(217,000)	50,000
Deferred revenue	92,000	254,000
Other current liabilities	(623,000)	217,000
Other noncurrent liabilities	(61,000)	3,000
Net cash used in operating activities	(2,911,000)	(6,102,000)
Cash flows from investing activities:
Capital expenditures	(142,000)	(850,000)
Net cash used in investing activities	(142,000)	(850,000)
Cash flows from financing activities:
Payments on financing lease obligations	(15,000)	(19,000)
Proceeds from long-term debt	800,000	500,000
Proceeds from related party line of credit	1,513,000
Proceeds from exercise of pre-funded warrants	23,000
Proceeds from issuance of common stock and prefunded warrants, net	756,000	6,032,000
Net cash provided by financing activities	3,077,000	6,513,000
Effects of foreign currency rate changes on cash and cash equivalents		(3,000)
Net increase (decrease) in cash, cash equivalents and restricted cash	24,000	(442,000)
Cash, cash equivalents and restricted cash at beginning of period	3,400,000	3,513,000
Cash, cash equivalents and restricted cash at end of period	3,424,000	3,071,000
Supplemental disclosures of cash flow information:
Cash paid for interest	1,668,000	657,000
Supplemental non-cash financing and investing information:
Recording of beneficial conversion feature on debt	2,313,000
Right-to-use asset acquired under operating lease	966,000
Transfer of equipment to inventories	33,000	172,000
Transfer of inventories to equipment		$ 420,000