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Statements of Cash Flows (USD $)
In Thousands
 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Cash flows from operating activities:    
Net loss $ (3,351) $ (4,078)
Adjustments to reconcile net loss to net cash used in operating activities:    
Loss from discontinued operations 232 12
Depreciation and amortization 94 123
Amortization of debt discount 25  
Stock-based compensation 345 1,188
Changes in operating assets and liabilities:    
Accounts receivable 110 (185)
Prepaid expenses and other assets (192) 316
Accounts payable 130 (34)
Accrued expenses 291 805
Deferred revenue (272) (52)
Net cash used in continuing operating activities (2,588) (1,905)
Net cash provided by discontinued operations    
Net cash used in operating activities (2,588) (1,905)
Cash flows from investing activities:    
Purchases of property and equipment   (12)
Net cash used in investing activities   (12)
Cash flows from financing activities:    
Advance proceeds from private placement units 20,300  
Proceeds from convertible note financing 1,500  
Proceeds from the exercise of stock options   42
Proceeds from the issuance of shares under the Employee Stock Purchase Plan 10 18
Net cash provided by financing activities 21,810 60
Net increase (decrease) in cash and cash equivalents 19,222 (1,857)
Cash and cash equivalents, beginning of period 2,109 7,593
Cash and cash equivalents, end of period $ 21,331 $ 5,736