CONSOLIDATED STATEMENTS OF REDEEMABLE CONVERTIBLE PREFERRED STOCK, REDEEMABLE CONVERTIBLE CLASS A-1 COMMON STOCK AND STOCKHOLDERS' EQUITY (DEFICIT) (PARENTHETICAL) $ in Thousands	12 Months Ended
	Apr. 30, 2020 USD ($)
Series G Preferred Stock
Issuance of Preferred Stock, issuance costs	$ 34
Series H Preferred Stock
Issuance of Preferred Stock, issuance costs	$ 164