Registration of securities issued in business combination transactions

Accounts Payable And Accrued Expenses (Details)

v3.20.2
Accounts Payable And Accrued Expenses (Details) - USD ($)
Jun. 30, 2020
Dec. 31, 2019
Dec. 31, 2018
Accounts Payable And Accrued Expenses [Abstract]      
Trade payables $ 1,651,659 $ 488,285 $ 547,519
Accrued expenses 454,850 471,700 140,637
Accrued research and development contract costs   221,170 1,782,131
Payroll liabilities 84,244 84,576 682,263
Total accounts payable and accrued expenses $ 2,190,753 $ 1,265,731 $ 3,152,550