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Accounts Receivable - Trade - Schedule of Accounts Receivable (Details) - USD ($)
Mar. 31, 2018
Dec. 31, 2017
Receivables [Abstract]    
Accounts receivable - trade $ 3,855,064 $ 3,846,724
Allowance for doubtful accounts (250,306) (200,874)
Allowance for sales returns and volume rebates (521,090) (555,918)
Accounts receivable - trade, net of allowances $ 3,083,668 $ 3,089,932