Accrued Expenses (Tables)

12 Months Ended

Dec. 31, 2015

Accrued Expenses

Schedule of accrued expenses

	December 31,
	2014		2015
Payroll and related costs	$	1,399,264	$	33,393
Research and development related costs		1,445,369		2,410,956
Professional fees		411,096		551,391
Interest		167,111		155,556
Other		304,944		31,119
	$	3,727,784	$	3,182,415