XML 33 R23.htm IDEA: XBRL DOCUMENT v3.10.0.1
Fair Value Measurements (Tables)
6 Months Ended
Jun. 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   $ 1,073,436     $       -     $ 1,073,436     $ 1,073,436  
Certificates of deposit     250,015       -       250,015       250,015  
                                 
Level 1:                                
Money market funds     701,243       -       701,243       701,243  
U.S. Treasury securities     5,714,143       -       5,714,143       5,714,143  
              -                  
Subtotal     6,415,386       -       6,415,386       6,415,386  
                                 
Total   $ 7,738,837     $  -     $ 7,738,837     $ 7,738,837