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Condensed Balance Sheets (Unaudited) (Parenthetical) - USD ($)
Sep. 30, 2016
Dec. 31, 2015
Assets    
Accounts receivable allowances $ 460,155 $ 483,349
Stockholders Equity    
Common stock, par value $ 0.01 $ 0.01
Common stock, authorized 25,000,000 25,000,000
Common stock, issued 13,976,059 13,477,803
Common stock, outstanding 13,976,059 13,477,803