3. Leases (Tables)

9 Months Ended

Jan. 31, 2020

Lessee Disclosure [Abstract]

Schedule of lease costs

	Three Months Ended January 31, 2020		Nine Months Ended January 31, 2020
Operating lease cost	$	798	$	2,570
Short-term lease cost		83		83
Variable lease cost		155		488
Total lease cost	$	1,036	$	3,141

Schedule of maturities of operating lease liabilities

Fiscal Year Ending April 30,	Total
2020 (remaining period)	$	735
2021		2,972
2022		2,995
2023		3,010
2024		3,086
Thereafter		21,938
Total lease payments	$	34,736
Less: imputed interest		(11,980	)
Total operating lease liabilities	$	22,756

Balance sheet classification of operating lease liabilities

	January 31, 2020
Operating lease liabilities	$	1,172
Operating lease liabilities, less current portion		21,584
Total operating lease liabilities	$	22,756