Annual report pursuant to Section 13 and 15(d)

7. Accrued Expenses (Details)

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7. Accrued Expenses (Details) - USD ($)
Dec. 31, 2017
Dec. 31, 2016
Payables and Accruals [Abstract]    
Accrued payroll and benefits $ 723,488 $ 109,315
Accrued professional fees 389,086 477,345
Accrued research costs 11,477 208,751
Other 11,602 43,477
Total accrued expenses $ 1,135,653 $ 838,888