Accrued Expenses (Tables)

12 Months Ended

Apr. 30, 2020

Payables And Accruals [Abstract]

Schedule of Accrued Expenses

At April 30, 2020 and 2019, accrued expenses consisted of (in thousands):

	2020		2019
Accrued research expense	$	2,821	$	3,065
Accrued compensation		2,333		1,949
Accrued professional fees		173		186
Other accrued expenses		128		447
Total accrued expenses	$	5,455	$	5,647