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Consolidated Balance Sheets (USD $)
In Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2011
Dec. 31, 2010
ASSETS    
Cash and cash equivalents $ 7,463 $ 7,025
Other current assets 364 137
Total current assets 7,827 7,162
Property and equipment, net 490 690
Other assets 264 304
Total assets 8,581 8,156
LIABILITIES AND STOCKHOLDERS' EQUITY    
Accounts payable 517 388
Accrued compensation and employee benefits 115 175
Accrued expenses and other liabilities 339 506
Deferred rent, current portion 33 121
Total current liabilities 1,004 1,190
Deferred rent, net of current portion 32 195
Total liabilities 1,036 1,385
Commitments and contingencies    
Preferred Stock:    
Preferred stock, $0.001 par value; 5 million shares authorized; none issued and outstanding as of June 30, 2011 and December 31, 2010    
Stockholders' equity:    
Common stock, $0.001 par value; 100 million shares authorized; 10,515,707 and 8,834,535 shares issued and outstanding at June 30, 2011 and December 31, 2010, respectively 11 9
Additional paid-in capital 67,756 65,072
Deficit accumulated during the development stage (60,222) (58,310)
Total stockholders' equity 7,545 6,771
Total liabilities and stockholders' equity $ 8,581 $ 8,156