Valuation and Qualifying Accounts Allowance for Returns and Doubtful Accounts (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance at Beginning of Period	$ 260,676	$ 191,285
Charges (Benefits) to Revenue	141,234	104,228
(Increases) Deductions	47,368	34,837
Balance at End of Period	$ 354,542	$ 260,676