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Valuation and Qualifying Accounts Allowance for Returns and Doubtful Accounts (Tables)
 12 Months Ended
Dec. 31, 2016
Valuation and Qualifying Accounts [Abstract]  
Schedule of Valuation Accounts
Period Ended
 
Balance at Beginning of Period
 
Charges / (Benefits) to Revenue
 
(Increases) Deductions
 
Balance at End of Period
December 31, 2016
 
$
191,285

 
104,228

 
34,837

 
$
260,676

December 31, 2015
 
$
119,530

 
(6,745
)
 
(78,500
)
 
$
191,285