CONDENSED CONSOLIDATED STATEMENTS OF REDEEMABLE CONVERTIBLE PREFERRED STOCK, REDEEMABLE CONVERTIBLE CLASS A-1 COMMON STOCK AND STOCKHOLDERS' EQUITY DEFICIT (PARENTHETICAL) - USD ($) $ in Thousands	9 Months Ended
	Jan. 31, 2021	Jan. 31, 2020
Issuance of Series G Preferred Stock, issuance costs (unaudited)	$ 6,710	$ 0
Series G Preferred Stock
Issuance of Series G Preferred Stock, issuance costs (unaudited)		34
Series H Preferred Stock
Issuance of Series G Preferred Stock, issuance costs (unaudited)		$ 164