Balance Sheet Components - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2020	Oct. 31, 2019
Balance Sheet Components [Abstract]
Depreciation expense	$ 800,000	$ 700,000	$ 1,500,000	$ 1,300,000
Goodwill impairment			$ 0	$ 0
Capitalized contract cost, amortization period	5 years		5 years
Impairment of deferred contract acquisition costs recognized			$ 0