Quarterly report pursuant to Section 13 or 15(d)

Notes Payable - Additional Information (Detail)

v2.4.0.8
Notes Payable - Additional Information (Detail) (USD $)
6 Months Ended
Jun. 30, 2013
Oct. 05, 2012
Aug. 14, 2012
Short-term Debt [Line Items]      
Royalty contractual term 8 years    
Long term debt paid   $ 19,050,000 $ 1,750,000
Revenue Interest Purchase Agreement
     
Short-term Debt [Line Items]      
Royalty percentage on net revenue 9.95%    
Total debt 20,800,000 20,800,000  
Revenue Interest Purchase Agreement | Minimum
     
Short-term Debt [Line Items]      
Varying amount 1,300,000    
Revenue Interest Purchase Agreement | Maximum
     
Short-term Debt [Line Items]      
Varying amount $ 2,500,000    
Put Option
     
Short-term Debt [Line Items]      
Internal rate of return on funded amount 20.00%    
Call Option [Member]
     
Short-term Debt [Line Items]      
Internal rate of return on funded amount 32.50%