v3.26.1
Basis of Presentation - Schedule of Excluded From the Dilutive Securities (Parenthetical) (Details) - shares
 3 Months Ended 9 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2026
Mar. 31, 2025
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Warrants outstanding 19,101,667   19,101,667  
Options [1],[2] 327,500 3,073,000 4,397,500 3,073,000
Warrants [1],[2],[3] 15,666,526 29,520,695 19,101,667 29,520,695
Common Stock [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Warrant exchange ratio     1.11829%  
Treasury Stock [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Options 4,070,000      
Warrants 3,435,141      
NioCorp Assumed Warrants [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Warrants outstanding 15,666,526 15,666,626 15,666,526 15,666,626
[1] Earnout Shares (as defined in Note 6 below) are excluded as the vesting terms were not met as of the end of the reporting period.
[2] The number of shares is based on the maximum number of shares issuable on exercise of the related securities as of the period end. For the three months ended March 31, 2026, amounts reflect only those securities excluded as antidilutive. In-the-money securities have been evaluated under the treasury stock method and are included in diluted weighted average shares outstanding.
[3] Includes 15,666,526 NioCorp Assumed Warrants (as defined in Note 7c below) (March 31, 2025: 15,666,626) that are each exercisable into 1.11829212 Common Shares. The remaining Warrants are each exercisable into one Common Share.
(4)
For the three months ended March 31, 2026, 4,070,000 Options and 3,435,141 Warrants were determined to be dilutive under the treasury stock method and are included in the calculation of diluted weighted average Common Shares outstanding.