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6. Prepaid Expenses (Tables)
3 Months Ended
Mar. 31, 2020
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Schedule of prepaid expenses

Prepaid expenses consist of the following:

 

   March 31,   December 31, 
   2020   2019 
Prepaid insurance costs  $12,779   $21,090 
Prepaid employee benefits   8,492    11,587 
Prepaid office and other costs   17,333    14,474 
Total prepaid expenses  $38,604   $47,151