CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities
Net loss	$ (4,238)	$ (3,428)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	527	556
Provision for inventory obsolescence	203	365
Gain on disposal of property and equipment, net	3	19
Stock based compensation	532	533
Change in fair value of derivative liabilities	(57)	555
Provision for allowance for doubtful accounts	128	126
Provision for deferred taxes	0	25
Changes in current assets and liabilities:
Trade receivables	528	(1,070)
Prepaid expenses	(221)	(48)
Inventories	(1,380)	(337)
Deposits and other assets	9	312
Accounts payable	(219)	436
Accrued and other liabilities	(250)	(337)
Net cash used in operating activities	(4,435)	(2,293)
Cash flows from investing activities
Purchases of technology, property and equipment	(431)	(182)
Net cash used in investing activities	(431)	(182)
Cash flows from financing activities
Proceeds from stock options/warrants exercised	0	119
Change in restricted cash	0	60
Repayment of mortgage note payable	(179)	(180)
Net cash used in financing activities	(179)	(1)
Net change in cash and cash equivalents	(5,045)	(2,476)
Cash and cash equivalents, beginning of period	14,456	11,805
Cash and cash equivalents, end of period	9,411	9,329
Cash paid for:
Interest paid	$ 103	$ 125