CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities
Net loss	$ (2,993)	$ (2,463)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	356	355
Provision for inventory obsolescence	83	334
Gain on disposal of property and equipment, net	2	14
Stock based compensation	341	360
Change in fair value of derivative liabilities	(126)	(128)
Provision for allowance for doubtful accounts	159	159
Changes in current assets and liabilities:
Trade receivables	(355)	(740)
Prepaid expenses	(125)	(20)
Inventories	(1,507)	(792)
Deposits and other assets	(72)	44
Accounts payable	471	560
Accrued and other liabilities	(128)	(63)
Net cash used in operating activities	(3,894)	(2,380)
Cash flows from investing activities
Purchases of technology, property and equipment	(151)	(41)
Net cash used in investing activities	(151)	(41)
Cash flows from financing activities
Change in restricted cash	0	60
Repayment of mortgage note payable	(119)	(120)
Net cash used in financing activities	(119)	(60)
Net change in cash and cash equivalents	(4,164)	(2,481)
Cash and cash equivalents, beginning of period	14,456	11,805
Cash and cash equivalents, end of period	10,292	9,324
Cash paid for:
Interest paid	$ 67	$ 50