Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Loss	$ (2,554)	$ (8,501)
Reconciliation of Net Loss to Net Cash Used in Operating Activities:
Amortization of debt discount	185	55
Depreciation	452	315
Loss on disposal of assets for lease	223	144
Allowance for doubtful accounts	108	272
Stock-based compensation expense	300	2,605
Changes in Operating Assets and Liabilities:
Trade accounts receivable	293	(1,195)
Prepaid expenses and other current assets	(38)	83
Accounts payable	(389)	750
Accrued expenses	55	997
Deferred revenue	(439)	340
Net Cash Used in Operating Activities	(1,804)	(4,135)
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to property and equipment	(223)	(532)
Change in restricted cash		2,100
Purchase of assets for lease	(591)	(572)
Net Cash (Used in) Provided by Investing Activities	(814)	996
CASH FLOWS FROM FINANCING ACTIVITIES:
Issuance of common stock		1,374
Proceeds from stock option exercise		14
Proceeds from loans payable	2,878
Payments of loans payable	(43)	(2,000)
Net Cash (Used in) Provided by Financing Activities	2,835	(612)
INCREASE (DECREASE) IN CASH	217	(3,751)
CASH, BEGINNING OF PERIOD	405	4,156
CASH, END OF PERIOD	622	405
Cash paid for interest	8	19
Supplemental disclosure of noncash financing activity:
Fair value of warrants issued to lenders	$ 407