CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Assets
Allowance for doubtful accounts	$ 43,727	$ 83,789
Stockholders Equity
Preferred stock par value (in usd per share)	$ 0.001	$ 0.001
Preferred stock shares authorized (in shares)	500,000	500,000
Preferred stock shares issued (in shares)	0	0
Preferred stock shares outstanding (in shares)	0	0
Common stock, par value (in usd per share)	$ 0.001	$ 0.001
Common stock shares authorized (in shares)	40,000,000	40,000,000
Common stock shares issued (in shares)	32,810,202	28,994,981
Common stock shares outstanding (in shares)	32,433,675	28,618,454
Treasury stock (in shares)	376,527	376,527

A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

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