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Accrued Expenses (Details) - USD ($)
Jun. 30, 2016
Dec. 31, 2015
Accrued Expenses    
Accrued compensation $ 305,000 $ 330,707
Research and development 1,595,516 284,057
Other 168,004 124,768
Accrued expenses $ 2,068,520 $ 739,532