Accrued Expenses (Tables)

3 Months Ended

12 Months Ended

Mar. 31, 2018

Dec. 31, 2017

Accrued Expenses [Abstract]

Summary of accrued expenses

	March 31, 2018		December 31, 2017
Clinical trial expenses	$	1,271,888	$	1,011,666
Other		334,938		131,640
Total	$	1,606,826	$	1,143,306

	For the Years Ended  December 31,
	2017		2016
Clinical trial expenses	$	1,011,666	$	741,174
Other		131,640		64,944
Total	$	1,143,306	$	806,118