Annual report pursuant to Section 13 and 15(d)

Income Taxes (Details)

v2.4.0.8
Income Taxes (Details) (USD $)
 3 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Components of Income Tax Expense (Benefit), Continuing Operations [Abstract]                      
Federal income tax (benefit) provision                 $ (14,000) $ (74,000) $ 15,000
Total 1,000 (15,000) 0 0 0 (74,000) 0 0 (14,000) (74,000) 15,000
Significant components of net deferred tax assets [Abstract]                      
Capitalized research and development expenses 49,400,000       51,500,000       49,400,000 51,500,000  
Net operating loss carryforwards 78,400,000       150,800,000       78,400,000 150,800,000  
Research and development and other credit carryforwards 8,800,000       8,500,000       8,800,000 8,500,000  
Other 23,500,000       23,300,000       23,500,000 23,300,000  
Total deferred tax assets 160,100,000       234,100,000       160,100,000 234,100,000  
Valuation allowance (160,100,000)       (234,100,000)       (160,100,000) (234,100,000)  
Net deferred tax assets 0       0       0 0  
Increase (decrease) in the valuation allowance                 (74,000,000) (6,000,000) 25,800,000
Unrecognized Tax Benefits [Roll Forward]                      
Beginning Balance       4,104,000         4,104,000    
Increase related to current year tax position                 164,000    
Increase related to prior year tax position                 6,000    
Ending Balance 4,274,000       4,104,000       4,274,000 4,104,000  
Unrecognized Tax Benefits that Would Impact Effective Tax Rate 3,000,000               3,000,000    
Stock Option [Member]
                      
Operating Loss Carryforwards [Line Items]                      
Net Operating Loss Carry-forwards 2,100,000               2,100,000    
State [Member]
                      
Operating Loss Carryforwards [Line Items]                      
Net Operating Loss Carry-forwards 164,000,000               164,000,000    
California [Member]
                      
Operating Loss Carryforwards [Line Items]                      
Net operating loss carry-forward expired                 16,800,000 10,400,000 9,500,000
Federal [Member]
                      
Operating Loss Carryforwards [Line Items]                      
Net Operating Loss Carry-forwards 205,000,000               205,000,000    
Net operating loss carry-forward expired                 $ 0 $ 0 $ 0