Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net loss	$ (3,370,000)	$ (2,097,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	159,000	185,000
Stock based compensation expense	137,000	247,000
(Recovery of) reserve for excess and slow-moving inventories	(29,000)	22,000
Change in fair value of derivative	(259,000)	(69,000)
Loss on disposal of equipment		70,000
Net change in operating assets and liabilities:
Accounts receivable	896,000	75,000
Inventories	(224,000)	(211,000)
Prepaid expenses and other assets	39,000	(58,000)
Accounts payable	69,000	(150,000)
Related party payable		606,000
Accrued payroll and related expenses	(92,000)	(1,315,000)
Deferred revenue	259,000	286,000
Other current liabilities	356,000	(167,000)
Other noncurrent liabilities	5,000	33,000
Net cash used in operating activities	(2,054,000)	(2,543,000)
Cash flows from investing activities:
Capital expenditures	(290,000)	(33,000)
Net cash used in investing activities:	(290,000)	(33,000)
Cash flows from financing activities:
Payments on capital lease obligations	(9,000)	(23,000)
Proceeds from long-term debt-related party	500,000	1,500,000
Payment of financing cost		(13,000)
Proceeds from issuance of common stock, net	1,213,000
Net cash provided by financing activities	1,704,000	1,464,000
Effects of foreign currency rate changes on cash and cash equivalents	(1,000)	4,000
Net decrease in cash, cash equivalents and restricted cash	(641,000)	(1,108,000)
Cash, cash equivalents and restricted cash at beginning of period	4,513,000	4,899,000
Cash, cash equivalents and restricted cash at end of period	3,872,000	3,791,000
Supplemental non-cash financing and investing information:
Transfer of equipment to inventories	$ 172,000	$ 625,000