Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jul. 31, 2022	Apr. 30, 2022	Apr. 30, 2021
Current assets:
Cash and cash equivalents	$ 37,863	$ 30,732
Marketable securities	104,212	135,470
Research and development tax credit receivable	17,248	14,098
Prepaid expenses and other current assets	11,084	13,347
Total current assets	170,407	193,647
Property and equipment, net	3,030	2,178
Right of use assets	8,664	7,862
Other assets	218	193
Total assets	182,319	203,880
Current liabilities:
Accounts payable	2,908	3,638
Accrued expenses	5,828	6,961
Lease liability - current portion	997	977
Total current liabilities	9,733	11,576
Long-term liabilities:
Lease liability - net of current portion	8,014	7,211
Total long-term liabilities	8,014	7,211
Commitments and contingencies (Note 6)
Stockholders’ equity
Common stock, $0.001 par value, 100,000,000 authorized Shares issued and outstanding: 24,570,872 at July 31, 2022 and 24,550,748 at April 30, 2022	25	25
Additional paid-in capital	441,914	439,104
Accumulated deficit	(273,217)	(250,175)
Accumulated other comprehensive loss	(4,150)	(3,861)
Total stockholders’ equity	164,572	185,093	$ 257,193
Total liabilities and stockholders’ equity	$ 182,319	$ 203,880