Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2022	Jan. 31, 2021
Statement of Comprehensive Income [Abstract]
Net loss	$ (144)	$ (5,117)	$ (16,821)	$ (24,425)
Other comprehensive income (loss):
Foreign currency translation gain (loss)	(232)	143	(205)	413
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ (376)	$ (4,974)	$ (17,026)	$ (24,012)