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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Cash flows from operating activities:    
Net loss $ (17,145) $ (31,626)
Adjustments to reconcile net loss to net cash used in operating activities:    
Stock-based compensation expense to employees and vendors 550 5,430
Fair value of common stock issued in settlements 0 647
Depreciation and amortization 26 11
Loss on extinguishment of debt 0 2,416
Debt discounts and deferred financing fees and the valuation of conversion features and warrants 14,735 19,963
Changes in operating assets and liabilities:    
Accounts receivable (3,228) (146)
Prepaid expenses and other current assets (79) (16)
Accounts payable and accrued expenses 322 (414)
Deferred revenue 1,366 540
Net cash used in operating activities (3,453) (3,195)
Cash flows from investing activities:    
Purchase of property and equipment (114) (14)
Net cash used in investing activities (114) (14)
Cash flows from financing activities:    
Proceeds from issuance of convertible debt 4,228 1,597
Repayment of convertible debt (25) 0
Proceeds from exercise of warrants 515 49
Proceeds from issuance of common stock, warrant repricing and preferred stock 10,787 2,421
Net cash provided by financing activities 15,505 4,067
Effect of exchange rates on cash 91 25
Net increase in cash 12,029 883
Cash at beginning of year 911 28
Cash at end of year 12,940 911
Supplemental disclosure of cash flow information:    
Interest paid in cash 27 180
Supplemental disclosure of non-cash transactions:    
Exchange of preferred stock for common stock 0 806
Reclassification of derivative liabilities to additional paid- in-capital upon conversion of debt and exercise of warrants 20,075 19,286
Value of shares of common stock and warrants issued to brokers in connection with financing, recorded as debt issuance costs and debt discount 0 129
Debt issuance costs recorded as part of 2011 financing transaction 35 0
Debt discount recorded as part of convertible debt financing transactions, including warrants issued in financing transactions 4,228 1,761
Accounts payable converted in 2010 convertible debt offering 0 163
Accrued expenses settled with shares of common stock 120 0
Conversion of debt and accrued interest to shares of common stock 7,222 179
Debt issuance costs recorded in connection of debt extinguishment transactions 20,075 4,336
Reduction of derivative liabilities upon conversion of debt and exercise of warrants $ 0 $ 8