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Accrued Expenses (Details) - USD ($)
Jun. 30, 2020
Dec. 31, 2019
Accrued Expenses    
Payroll and related benefits $ 18,279 $ 131,530
Accrued interest expense   36,041
Accrued professional fees 31,212 103,300
Accrued license payments 529,000 506,000
Total accrued expenses $ 578,491 $ 776,871