Schedule II-Valuation and Qualifying Accounts
 12 Months Ended
Dec. 31, 2015
Valuation and Qualifying Accounts [Abstract]  
Schedule II-Valuation and Qualifying Accounts
Description
Balance at
Beginning
of Year
 
Charged to
Costs and
Expense
 
Deductions
from
Reserves
 
Balance at
End of
Year
Allowance for doubtful accounts:
 
 
 
 
 
 
 
Year Ended December 31, 2015
$
186,517

 
$
243,029

 
$
(18,152
)
 
$
411,394

Year Ended December 31, 2014
182,078

 
60,841

 
(56,402
)
 
186,517