Accrued expenses (Tables)

3 Months Ended

Mar. 31, 2020

Accrued expenses

Schedule of accrued expenses

	March 31,		December 31,
	2020		2019
Professional fees	$	103,067	$	207,917
Compensation and benefits		1,109,672		961,790
Research and development		6,637,811		4,992,311
Other		448,219		480,535
Total accrued expenses	$	8,298,769	$	6,642,553