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, 2020
$ / shares
shares
Balance – June 30, 2020 | shares 10,309,000
Issuance of Adgero Warrants | shares 2,314,000
Exercise of warrants | shares (994,000) [1]
Warrants issued for services | shares 330,000 [2]
Expiry of warrants | shares (101,000) [3]
Balance – September 30, 2020 | shares 11,858,000
Beginning balance | $ / shares $ 2.71
Issuance of Adgero Warrants | $ / shares 3.18
Stock option exercise price | $ / shares 1.00 [1]
Warrants issued for services | $ / shares 1.49 [2]
Expiry of warrants | $ / shares 30.00 [3]
Ending balance | $ / shares $ 2.67
[1] A total of 994,000 2020 Investor Warrants were exercised at $1.00 per share.
[2] Warrants issued for services are exercisable at various prices and expire at the various dates noted in the table below.
[3] The warrant expiries include the 2015 Investor Warrants, the 2015 Agent Warrants, and certain warrants issued for services. All of the expired warrants were exercisable at $30 per share.