Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Schedule of Warrants (Detail)

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Stockholders' Equity - Schedule of Warrants (Detail) - Common Stock Warrants [Member]
3 Months Ended
Sep. 30, 2021
$ / shares
shares
Balance – June 30, 2021 | shares 6,974,000
Issuance of 2022 Investor Warrants | shares 12,000,000
Issuance of PFW | shares 4,800,000
Issuance of 2022 Agent Warrants | shares 600,000
Exercise of PFW | shares (4,800,000)
Exercise of 2020 Investor Warrants | shares (69,000)
Expiry of Adgero replacement warrants | shares (353,000)
Balance – September 30, 2021 | shares 19,152,000
Beginning balance | $ / shares $ 3.34
Issuance of 2022 Investor Warrants | $ / shares 1.25
Issuance of PFW | $ / shares 0.001
Issuance of 2022 Agent Warrants | $ / shares 1.5625
Exercise of PFW | $ / shares 0.001
Stock option exercise price | $ / shares 1.00
Expiry of Adgero replacement warrants | $ / shares 3.18
Ending balance | $ / shares $ 1.99