Annual report pursuant to Section 13 and 15(d)

Income Taxes (Details Textual)

v2.4.0.6
Income Taxes (Details Textual) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Income Taxes (Textual) [Abstract]      
Net operating loss carryforwards 2032    
Income Taxes (Additional Textual) [Abstract]      
Federal research and development tax credits expire 2031    
Federal and State net operating loss carryforwards $ 12,400,000    
Valuation allowance decreased 3,100,000 1,300,000 800,000
Unrecognized tax benefits 0 0 0
Unrecognized tax benefits or any amounts accrued for interest and penalties 0 0 0
Effective income tax rate reconciliation at Federal statutory income tax rate 34.00%    
Deferred tax 340,000    
Domestic Tax Authority [Member]
      
Income Taxes (Textual) [Abstract]      
Net operating loss carryforwards for tax purposes 215,700,000    
CALIFORNIA [Member]
      
Income Taxes (Textual) [Abstract]      
Net operating loss carryforwards for tax purposes 146,700,000    
Net operating loss carryforwards 2032    
Research [Member]
      
Income Taxes (Textual) [Abstract]      
Tax credits 7,600,000    
Research [Member] | State and Local Jurisdiction [Member]
      
Income Taxes (Textual) [Abstract]      
Tax credits $ 7,800,000    
Maximum [Member]
      
Income Taxes (Textual) [Abstract]      
U.S. Federal and State income tax examination 2012    
Income Taxes (Additional Textual) [Abstract]      
U.S. Federal and State income tax examination 2012    
Minimum [Member]
      
Income Taxes (Textual) [Abstract]      
U.S. Federal and State income tax examination 1995    
Income Taxes (Additional Textual) [Abstract]      
U.S. Federal and State income tax examination 1995