Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Net loss	$ (1,524)	$ (5,739)
Adjustments to reconcile net loss to net cash flows from operating activities:
Depreciation and amortization	590	262
Non-cash stock compensation	302	330
Warrant derivative gains	(3,393)
Provision for bad debts	171	293
Changes in assets and liabilities:
Accounts receivable	(338)	40
Supplies, prepaid expenses and other assets	(66)	131
Accounts payable, accrued expenses and other	159	116
Net cash flows from operating activities	(4,099)	(4,567)
Investing activities:
Purchases of property and equipment	(288)	(20)
Net cash flows from investing activities	(288)	(20)
Financing activities:
Net proceeds from exercise of Series A common stock warrants	2,399
Payment of accrued financing costs from issuance of Series A convertible preferred stock	(106)
Repayment of capital lease obligations	(192)	(89)
Net cash flows from financing activities	6,022	(89)
Increase (decrease) in cash and cash equivalents	1,635	(4,676)
Cash and cash equivalents, beginning	2,372	6,385
Cash and cash equivalents, ending	4,007	1,709
Non-cash financing activities:
Property and equipment purchased under capital lease		37
Series B Convertible Preferred Stock [Member]
Financing activities:
Net proceeds from issuance of convertible preferred and common stock	1,768
Non-cash financing activities:
Deemed dividends from issuing convertible preferred stock	417
Series C Convertible Preferred Stock [Member]
Financing activities:
Net proceeds from issuance of convertible preferred and common stock	2,153
Non-cash financing activities:
Deemed dividends from issuing convertible preferred stock	1,213
Series A Convertible Preferred Stock [Member]
Non-cash financing activities:
Conversion of Series A convertible preferred stock into common stock	$ 394