Stockholders' Equity - Schedule of Warrants (Detail) - $ / shares		12 Months Ended
		Jun. 30, 2023	Jun. 30, 2022
Weighted-average exercise price of stock options and rights		$ 51.71
Warrant [Member]
Beginning Balnce		720,000	139,000
Beginning balance		$ 49.36	$ 167.21
Issuance of 2022 Investor Warrants			240,000
Issuance of 2022 Investor Warrants			$ 62.50
Issuance of PFW			96,000
Issuance of PFW			$ 0.05
Issuance of 2022 Agent Warrants			12,000
Issuance of 2022 Agent Warrants			$ 78.13
Issuance of 2022 April Investor Warrants			324,000
Issuance of 2022 April Investor Warrants			$ 20.50
Issuance of 2022 April Agent Warrants			32,000
Issuance of 2022 April Agent Warrants			$ 33.13
Exercise of PFW			(96,000)
Exercise of PFW			$ 0.05
Exercise of 2020 Investor Warrants			(1,000)
Weighted-average exercise price of stock options and rights			$ 50.00
Expiry of warrants	[1]		(26,000)
Expired	[1]		$ 427.51
Ending balance		713,000	720,000
Ending balance		$ 43.55	$ 49.36
Warrant [Member] | 2018 Investor and Agent Warrants [Member]
Expiry of warrants		(7,000)
Expired		$ 625.68

[1] Expired warrants include: 21 Adgero replacement warrants with an exercise price of $159.00, four 2017 Investor Warrants with an exercise price of $1,750.00, and one 2017 Agent Warrant with an exercise price of $2,030.00.