Condensed Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (1,722)	$ (1,972)
Reconciliation of Net Loss to Net Cash Used in Operating Activities:
Amortization of debt discount	80	84
Accretion of non-cash interest	44
Loss on extinguishment of debt	179
Depreciation	267	221
Loss on disposal of assets for lease	142	136
Allowance for doubtful accounts	5	18
Stock-based compensation expense	165	135
Changes in Operating Assets and Liabilities:
Trade accounts receivable	(13)	653
Prepaid expenses and other current assets	(7)	(72)
Accounts payable	96	(409)
Accrued expenses	505	(49)
Deferred revenue	189	(285)
Net Cash Used in Operating Activities	(70)	(1,540)
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to property and equipment	(12)	(15)
Purchase of assets for lease	(591)	(306)
Net Cash Used in Investing Activities	(603)	(321)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of common stock	475
Proceeds from stock option exercise	78
Proceeds from loans payable	63	2,478
Payments of loans payable	(69)
Net Cash Provided by Financing Activities	547	2,478
(DECREASE)INCREASE IN CASH	(126)	617
CASH, BEGINNING OF PERIOD	622	405
CASH, END OF PERIOD	496	1,022
Cash paid for interest	7
Supplemental disclosure of noncash financing activity:
Reclassification of accrued interest to debt upon extinguishment	162
Fair value of warrants issued to lenders	$ 288	$ 363