Annual report pursuant to Section 13 and 15(d)

7. Accrued Expenses (Details)

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7. Accrued Expenses (Details) - USD ($)
Dec. 31, 2016
Dec. 31, 2015
Payables and Accruals [Abstract]    
Accrued payroll and benefits $ 109,315 $ 625,289
Accrued professional fees 477,345 413,945
Accrued research costs 208,751 145,026
Accrued interest 0 77,857
Other 43,477 224,929
Total accrued expenses $ 838,888 $ 1,487,046