Quarterly report pursuant to sections 13 or 15(d)

Estimated Annual Amortization Expense (Detail)

v2.4.0.6
Estimated Annual Amortization Expense (Detail) (USD $)
Mar. 31, 2013
Dec. 31, 2012
Estimated Amortization Expense [Line Items]    
2013 $ 1,733,558  
2014 1,078,909  
2015 1,072,631  
2016 1,068,230  
2017 1,068,230  
Thereafter 6,680,243  
Net Carrying Amount $ 12,701,801 $ 12,052,876