Annual report pursuant to Section 13 and 15(d)

6. Accrued Expenses (Details)

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6. Accrued Expenses (Details) - USD ($)
Dec. 31, 2018
Dec. 31, 2017
Payables and Accruals [Abstract]    
Accrued payroll and benefits $ 53,541 $ 723,488
Accrued professional fees 394,075 389,086
Accrued research costs 205,067 11,477
Other 11,346 11,602
Total accrued expenses $ 664,029 $ 1,135,653