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11. Commitments and Contingencies (Details)
 3 Months Ended 6 Months Ended
Jun. 30, 2019
USD ($)
Jun. 30, 2019
USD ($)
Commitments And Contingencies    
Operating lease $ 41,342 $ 82,684
Short-term leases 0 0
Total lease cost 41,342 82,684
Cash payments included in the measurement of lease liability in operating cash flows $ 42,827 $ 84,206
Discount rate 5.50% 5.50%
Remaining lease term in years 5 years 5 years