Annual report pursuant to Section 13 and 15(d)

Income Taxes (Details Textual)

v2.4.0.8
Income Taxes (Details Textual) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Operating Loss Carryforwards [Line Items]        
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost, Unrecognized $ 11,800,000      
Income Taxes (Textual) [Abstract]        
Federal net operating loss carryforwards, utilized 39,700,000      
Accrued interest and penalties on unrecognized tax benefits 500,000      
Increase in unrecognized tax benefit 100,000      
Approximate unrecognized tax benefits 200,000 200,000    
Effective income tax rate 300,000      
Total gross unrecognized tax benefit 9,231,000 9,245,000 5,250,000 5,413,000
Minimum [Member]
       
Operating Loss Carryforwards [Line Items]        
Expiration Period 15 years      
Maximum [Member]
       
Operating Loss Carryforwards [Line Items]        
Expiration Period 20 years      
Research and Development Tax Credit Carryforwards [Member]
       
Operating Loss Carryforwards [Line Items]        
Research and development tax credit carryforwards 4,900,000      
Federal [Member]
       
Operating Loss Carryforwards [Line Items]        
Operating loss carryforwards 223,800,000      
State [Member]
       
Operating Loss Carryforwards [Line Items]        
Operating loss carryforwards 200,200,000      
Foreign [Member]
       
Operating Loss Carryforwards [Line Items]        
Operating loss carryforwards 76,800,000      
Foreign [Member] | PROLOR [Member]
       
Operating Loss Carryforwards [Line Items]        
Operating loss carryforwards $ 54,600,000