Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Operating activities:
Net loss	$ (169)	$ (4,401)
Adjustments to reconcile net loss to net cash flows from operating activities:
Depreciation and amortization	481	175
Non-cash stock compensation	179	254
Warrant derivative gains	(3,274)
Provision for bad debts	115	278
Changes in assets and liabilities:
Accounts receivable	(290)	199
Supplies, prepaid expenses and other assets	(18)	292
Accounts payable, accrued expenses and other	160	56
Net cash flows from operating activities	(2,816)	(3,147)
Investing activities:
Purchases of property and equipment	(80)	(20)
Net cash flows from investing activities	(80)	(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	(127)	(59)
Net cash flows from financing activities	6,248	(59)
Increase (decrease) in cash and cash equivalents	3,352	(3,226)
Cash and cash equivalents, beginning	2,372	6,385
Cash and cash equivalents, ending	5,724	3,159
Non-cash financing activities:
Property and equipment purchased under capital lease		19
Series B Convertible Preferred Stock [Member]
Financing activities:
Net proceeds from issuance of convertible preferred and common stock	1,768
Non-cash financing activities:
Conversion of convertible preferred stock into common stock	303
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	2,314
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 convertible preferred stock into common stock	$ 394