XML 50 R22.htm IDEA: XBRL DOCUMENT v2.4.0.8
Significant Accounting Policies - Additional Information (Detail) (USD $)
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Dec. 31, 2012
Significant Accounting Policies [Line Items]          
Sales discount percentage 2.00%   2.00%    
Sales discount term     30 days    
Warrant derivative liability fair value assumptions, risk-free rate     0.10%   0.25%
Derivative liability fair value assumptions, term     1 year   1 year 9 months 18 days
Warrant derivative liability fair value assumptions, dividend yield     0.00%   0.00%
Warrant derivative liability fair value assumptions, volatility rate     91.00%   95.00%
Gain (loss) on change in fair value of derivative liabilities $ (1,402,000) $ 16,454,000 $ 21,059,000 $ (68,686,000)  
Market price of common stock $ 6.32   $ 6.32    
Hypothetical increase in market price of common shares     10.00%    
Long term debt redemption feature         14,600,000
Maximum
          
Significant Accounting Policies [Line Items]          
Short term highly liquid instruments, maturity date     90 days    
Embedded Derivative Financial Instruments
          
Significant Accounting Policies [Line Items]          
Gain (loss) on change in fair value of derivative liabilities 1,400,000   7,400,000    
Change of control obligation         140,000,000
Maximum repayment of future revenue and receivables         150,000,000
Long term debt redemption feature 7,200,000   7,200,000   14,600,000
Embedded Derivative Financial Instruments | Maximum
          
Significant Accounting Policies [Line Items]          
Derivative liability fair value assumptions, term     4 years 4 months 24 days   8 years
Derivative liability fair value assumption, coupon rate     12.50%   11.50%
Derivative liability fair value assumptions, market yields     25.80%   27.70%
Embedded Derivative Financial Instruments | Minimum
          
Significant Accounting Policies [Line Items]          
Derivative liability fair value assumptions, term     3 years 6 months   4 years 9 months 18 days
Derivative liability fair value assumption, coupon rate     9.90%   3.00%
Derivative liability fair value assumptions, market yields     10.40%   10.70%
Foreign Exchange Forward
          
Significant Accounting Policies [Line Items]          
Notional amounts, foreign exchange forward contracts 4,500,000   4,500,000    
Number of foreign exchange forward contract 1   1    
Net fair value, foreign exchange forward contracts 400,000   400,000    
Foreign Exchange Forward | Other Current Liabilities
          
Significant Accounting Policies [Line Items]          
Gain (loss) on change in fair value of derivative liabilities     400,000    
Effect of a hypothetical 10% increase in the market price of common shares
          
Significant Accounting Policies [Line Items]          
Increase (Decrease) in the fair value of warrant derivative liability     5,000,000    
Market price of common stock $ 6.95   $ 6.95    
Warrant
          
Significant Accounting Policies [Line Items]          
Warrant derivative liability 39,600,000   39,600,000   54,854,000
Warrants Issued October 2009
          
Significant Accounting Policies [Line Items]          
Increase (Decrease) in the fair value of warrant derivative liability 3,600,000   (15,300,000)    
Gain (loss) on change in fair value of derivative liabilities (3,300,000)   14,100,000    
Compensation expense (income) for change in fair value of warrants issued to former employees $ 300,000   $ (1,200,000)