Leases (Tables)

12 Months Ended

Apr. 30, 2020

Leases [Abstract]

Summary of Lease Costs

The following table summarizes lease costs included in research and development and general and administrative expense for the year ended April 30, 2020 (in thousands):

	Year Ended
	April 30, 2020
Operating lease costs	$	743
Finance lease costs		54
Short-term lease costs		13
Variable lease costs		47
Total lease costs	$	857

Summary of Maturity of Undiscounted Payments Due Under Lease Liabilities and Present Value of Liabilities

The following table summarizes the maturity of undiscounted payments due under lease liabilities and the present value of those liabilities as of April 30, 2020 (in thousands):

Years ending April 30,	Operating Leases
2021	$	679
2022		383
2023		239
2024		142
2025		142
Thereafter		439
Total lease payments		2,024
Less: imputed interest	379
Total lease liabilities		1,645
Current lease liabilities	588
Long-term lease liabilities	$	1,057

Schedule of Future Minimum Payments Under Finance and Operating Leases

Future minimum payments under these leases as of April 30, 2019 are as follows (in thousands):

Years ending April 30,	Finance Leases		Operating Leases
2020	$	54	$	687
2021		—		474
2022		—		328
2023		—		194
2024 and thereafter		—		495
Total minimum lease payments	$	54	$	2,178
Less amounts representing interest		—
Present Value of minimum payments		54
Current portion		54
Long-term portion	$	—

Summary of Lease Term and Discount Rate

The following table summarizes the lease term and discount rate as of April 30, 2020:

	April 30, 2020
Weighted-average remaining lease term (years)
Operating leases	4.8
Weighted-average discount rate
Operating leases		9.0	%

Summary of Cash Paid for Amounts Included in Measurement of Lease Liabilities

The following table summarizes the cash paid for amounts included in the measurement of lease liabilities for the year ended April 30, 2020 (in thousands):

	April 30, 2020
Cash paid for amounts included in the measurement of operating lease liabilities	$	708
Cash paid for amounts included in the measurement of finance lease liabilities	$	54