Condensed Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (1,972)	$ (2,713)
Reconciliation of Net Loss to Net Cash Used in Operating Activities:
Amortization of debt discount	84	37
Depreciation	221	129
Loss on disposal of assets for lease	136	44
Allowance for doubtful accounts	18	73
Stock-based compensation expense	135	63
Changes in Operating Assets and Liabilities:
Trade accounts receivable	653	20
Prepaid expenses and other current assets	(72)	9
Accounts payable	(409)	27
Accrued expenses	(49)	21
Deferred revenue	(285)	(132)
Net Cash Used in Operating Activities	(1,540)	(2,422)
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to property and equipment	(15)	(45)
Purchase of assets for lease	(306)	(261)
Net Cash Used in Investing Activities	(321)	(306)
CASH FLOWS FROM FINANCING ACTIVITIES:
Issuance of common stock		999
Stock options exercised		13
Offering costs		(100)
Proceeds from loans payable	2,478
Net Cash Provided by Financing Activities	2,478	912
INCREASE (DECREASE) IN CASH	617	(1,816)
CASH, BEGINNING OF PERIOD	405	4,156
CASH, END OF PERIOD	1,022	2,340
Cash paid for interest		$ 13
Supplemental disclosure of noncash financing activity:
Fair value of warrants issued to lenders	$ 363