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Significant Accounting Policies - Additional Information (Detail) (USD $)
 3 Months Ended 6 Months Ended 12 Months Ended 6 Months Ended 6 Months Ended 6 Months Ended 6 Months Ended 6 Months Ended 0 Months Ended 6 Months Ended 0 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Segment
Jun. 30, 2013
Dec. 31, 2013
Dec. 31, 2012
Jun. 30, 2013
Foreign Exchange Contract
Jun. 30, 2014
Foreign Exchange Contract
Dec. 31, 2013
Foreign Exchange Contract
Jun. 30, 2014
Embedded Derivative Financial Instruments
Jun. 30, 2013
Embedded Derivative Financial Instruments
Dec. 31, 2013
Embedded Derivative Financial Instruments
Dec. 31, 2012
Embedded Derivative Financial Instruments
Jun. 30, 2014
Effect of a hypothetical 10% increase in the market price of common shares
Jun. 30, 2014
Warrants Issued October 2009
Jun. 30, 2014
Top Three Customers
Gross Product Sales
Jun. 30, 2013
Top Three Customers
Gross Product Sales
Jun. 30, 2014
Top Three Customers
Accounts Receivable
Jun. 30, 2013
Top Three Customers
Accounts Receivable
Jun. 30, 2014
Convertible Debt
Jun. 30, 2014
Convertible Debt
2012 Notes
Dec. 31, 2013
Convertible Debt
2012 Notes
Jun. 30, 2014
Convertible Debt
2014 Notes
May 31, 2014
Convertible Debt
2014 Notes
Jun. 30, 2014
Convertible Debt
2014 Notes
Non Cash Items
Jun. 30, 2014
Warrant
Dec. 31, 2013
Warrant
Jun. 30, 2014
Maximum
Dec. 31, 2013
Maximum
Embedded Derivative Financial Instruments
Jun. 30, 2014
Maximum
Embedded Derivative Financial Instruments
Dec. 31, 2013
Minimum
Embedded Derivative Financial Instruments
Jun. 30, 2014
Minimum
Embedded Derivative Financial Instruments
Significant Accounting Policies [Line Items]                                                                
Deferred revenue $ 0 $ 1,833,000 $ 0 $ 1,833,000 $ 1,703,000                                                      
Sales discount percentage 2.00%   2.00%                                                          
Sales discount term     30 days                                                          
Short term highly liquid instruments, maturity date                                                       90 days        
Trade receivables, credit period     30 days                                                          
Carrying value include debt discount                                       3,500,000 0 700,000 27,900,000 27,900,000 30,800,000              
Concentration risk percentage                               95.00% 96.00% 96.00% 98.00%                          
Derivative, amount outstanding               0 0                                              
Warrant derivative liability                                                   4,500,000 6,900,000          
Derivative liability fair value assumptions, risk-free rate     0.04%   0.12%                                   3.30%                  
Derivative liability fair value assumptions, term     3 months 18 days   9 months 18 days                                               6 years 7 months 6 days 4 years 1 month 6 days 3 years 3 months 18 days 2 years 9 months 18 days
Derivative liability fair value assumptions, dividend yield     0.00%   0.00%                                   23.80%                  
Derivative liability fair value assumptions, volatility rate     120.00%   99.00%                                   76.00%                  
Increase (Decrease) in the fair value of warrant derivative liability                           1,100,000 (2,400,000)                                  
Gain (loss) on change in fair value of derivative liability 3,011,000 18,841,000 7,404,000 22,461,000     (887,000)     5,200,000 5,977,000       2,200,000               200,000                  
Compensation expense (income) for change in fair value of warrants issued to former employees                             (200,000)                                  
Market price of common stock $ 1.76   $ 1.76                     $ 1.94                                    
Hypothetical increase in market price of common shares     10.00%                                                          
Change of control obligation                         140,000,000                                      
Maximum repayment of future revenue and receivables                         150,000,000                                      
Derivative liability fair value assumption, coupon rate                                                         12.50% 12.50% 9.90% 9.90%
Derivative liability fair value assumptions, market yields                                                         29.40% 15.20% 9.00% 10.10%
Long term debt redemption feature           $ 14,600,000       $ 6,100,000   $ 11,100,000                     $ 3,300,000                  
Number of operating segments     1