Accrued Expenses and Other Noncurrent Liabilities (Tables)
 9 Months Ended
Sep. 30, 2016
Payables and Accruals [Abstract]  
Components of accrued expenses
The components of accrued expenses at September 30, 2016 and December 31, 2015 were as follows:
 
September 30, 2016
 
December 31, 2015
Accrued compensation
$
15,342,497

 
$
17,937,504

Accrued rebates
2,588,445

 
2,535,606

Accrued employee benefits
2,196,268

 
2,809,239

Accrued professional service fees
1,349,658

 
1,837,749

Accrued interest
2,589,289

 
1,463,880

Deferred rent
2,288,781

 
400,809

Other
8,251,980

 
3,298,275

Total accrued expenses
$
34,606,918

 
$
30,283,062