Quarterly report pursuant to Section 13 or 15(d)

Notes Payable - Notes Payable (Parenthetical) (Detail)

v2.4.0.8
Notes Payable - Notes Payable (Parenthetical) (Detail) (Revenue Interest Purchase Agreement, USD $)
 6 Months Ended
Jun. 30, 2013
Oct. 05, 2012
Jun. 30, 2013
Minimum
Jun. 30, 2013
Maximum
Debt Instrument [Line Items]        
Royalty percentage on net revenue 9.95%      
Royalty percentage on product revenue 9.95%      
Total debt $ 20,800,000 $ 20,800,000    
Varying amount     1,300,000 2,500,000
Minimum contractual payment related to note payable in 2014 1,250,805      
Minimum contractual payment related to note payable in 2015 6,781,440      
Minimum contractual payment related to note payable in 2016 9,232,642      
Minimum contractual payment related to note payable in 2017 and 2018 9,000,000      
Minimum contractual payment related to note payable in 2019 9,063,000      
Minimum contractual payment related to note payable in 2020 $ 6,939,000