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Fair Value Measurements (Tables)
9 Months Ended
Sep. 30, 2018
Fair Value Disclosures [Abstract]  
Schedule of cash and investments by significant investment category
   Adjusted Cost   Change in Fair Value   Fair Value   Cash and Cash Equivalents 
                 
Cash  $649,074   $-   $649,074   $649,074 
                     
Level 1:                    
Money market funds   302,663    -    302,663    302,663 
U.S. Treasury securities   6,265,617    -    6,265,617    6,265,617 
Subtotal   6,568,280    -    6,568,280    6,568,280 
                     
Total  $7,217,354   $-   $7,217,354   $7,217,354