v3.26.3
Common Shares (Details Narrative)
1 Months Ended 12 Months Ended
Feb. 25, 2026
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Nov. 21, 2025
Oct. 15, 2025
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Sep. 29, 2025
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Sep. 19, 2025
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Jul. 18, 2025
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Apr. 21, 2025
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Apr. 17, 2025
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Nov. 13, 2024
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Nov. 13, 2024
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Nov. 05, 2024
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Sep. 17, 2024
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Apr. 12, 2024
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Apr. 12, 2024
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Mar. 17, 2023
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Jan. 31, 2025
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Jun. 30, 2026
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TradingDays
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Jun. 30, 2025
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Mar. 04, 2026
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Oct. 17, 2025
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Sep. 30, 2025
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Nov. 30, 2024
USD ($)
Nov. 04, 2024
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Jun. 30, 2024
$ / shares
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Accumulated Other Comprehensive Income (Loss) [Line Items]                                                
Common stock, shares issued 17,400,000   10,152,175 7,004,740 10,000,000 13,850,000                   2,577,320 145,838,380 58,491,196   5,924,942 2,755,218      
Offering price of common shares issued in offering | $ / shares           $ 3.25                     $ 0 $ 0            
Offering price of common shares issued in offering | $ / shares $ 5   $ 9.34 $ 6.15 $ 5       $ 1.7675 $ 1.7675                            
Net Proceeds | $ $ 93,406,000   $ 138,974,000 $ 55,365,000 $ 46,048,000 $ 41,335,000                     $ 467,202,000 $ 45,666,000            
Common share description On February 25, 2026, the Company issued and sold (a) 17,400,000 Common Shares at an offering price of $5.00 per Common Share and (b) 2,600,000 pre-funded Warrants (the “February Pre-Funded Warrants”) to purchase up to an additional 2,600,000 Common Shares at an offering price of $4.9999 per February Pre-Funded Warrant in a registered offering (the “February 2026 Offering”) under the Company's registration statement on Form S-3 (Registration No. 333-290837), pursuant to the Placement Agency Agreement between the Company and Maxim, dated February 24, 2026. On February 25, 2026 and March 4, 2026, the Company issued a total of 2,599,951 Common Shares in connection with the cashless exercise of all of the outstanding February Pre-Funded Warrants. The Company received net proceeds from the February 2026 Offering, after deducting placement agent fees and other offering expenses payable by the Company, of approximately $93,406.   On October 15, 2025, the Company issued and sold (a) 10,152,175 Common Shares at an offering price of $9.34 per Common Share and (b) 5,925,000 pre-funded Warrants (the “October Pre-Funded Warrants”) to purchase up to an additional 5,925,000 Common Shares at an offering price of $9.3399 per October Pre-Funded Warrant in a registered offering (the “October 2025 Offering”) under the Company's registration statement on Form S-3 (Registration No. 333-290837), pursuant to the Placement Agency Agreement between the Company and Maxim, dated October 13, 2025. On October 17, 2025, the Company issued 5,924,942 Common Shares in connection with the cashless exercise of all of the outstanding October Pre-Funded Warrants. The Company received net proceeds from the October 2025 Offering, after deducting placement agent fees and other offering expenses payable by the Company, of approximately $138,974. On September 29, 2025, the Company issued and sold (a) 7,004,740 Common Shares at a public offering price of $6.15 per Common Share and (b) 2,755,260 pre-funded Warrants to purchase an aggregate of 2,755,260 Common Shares (the “September Pre-Funded Warrants”) at a public offering price of $6.1499 per September Pre-Funded Warrant in a confidentially marketed public offering (the “September 2025 Public Offering”) under the Company’s registration statement on Form S-3 (Registration No. 333-280176), pursuant to the Placement Agency Agreement between the Company and Maxim, dated September 26, 2025. On September 30, 2025, the Company issued 2,755,218 Common Shares in connection with the cashless exercise of all of the outstanding September Pre-Funded Warrants. The Company received net proceeds from the September 2025 Public Offering, after deducting placement agent fees and other offering expenses payable by the Company, of approximately $55,365.                       On January 31, 2025, the Company closed an underwritten registered direct offering (the “January 2025 Offering”), pursuant to an underwriting agreement, dated January 29, 2025, with Maxim, as underwriter, pursuant to which the Company issued and sold 2,577,320 Common Shares, 2,577,320 Series A Warrants to purchase up to 2,577,320 Common Shares (the “January 2025 Series A Warrants”) and 1,288,660 Series B Warrants to purchase up to an additional 1,288,660 Common Shares (the “January 2025 Series B Warrants” and, together with the January 2025 Series A Warrants, the “January 2025 Warrants”). Each Common Share was sold together with one January 2025 Series A Warrant and one-half of one January 2025 Series B Warrant at a combined public offering price of $1.94. The gross proceeds from the January 2025 Offering were approximately $5,000 before deducting underwriting discounts and offering expenses. The January 2025 Warrants were classified as equity instruments, and accordingly, the net proceeds were allocated based on the relative fair values of the Common Shares and the January 2025 Warrants on the date of issuance, with $2,200 allocated to the fair value of the January 2025 Warrants and the balance of the proceeds of $2,800 allocated to Common Shares. The Company incurred total transaction costs related to the January 2025 Offering of $799, which were treated as share issuance costs at closing. The January 2025 Series A Warrants have an exercise price of $1.98 per underlying Common Share, are exercisable immediately, and will expire on August 2, 2027. The January 2025 Series B Warrants have an exercise price of $2.05 per underlying Common Share, are exercisable immediately, and will expire on January 31, 2029.                
Common stock shares     5,925,000 2,755,260                                        
Number of share outstanding                                   18,707,780            
Outstanding stock options vested                                 53.30%              
Aggregate number of common shares available for awards                                 11,300,000              
Maximum annual compensation | $                                 $ 750,000              
Intrinsic value of Options exercised | $                                 1,654,000              
Unrecognized compensation costs | $                                 $ 1,540,000              
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross                                 2,282,500 945,000            
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price | $ / shares                                 $ 4.68 $ 1.41            
Average grant-date fair value | $ / shares                                 $ 2.84 $ 0.84            
Risk-free interest rate                                 3.84% 4.44%            
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate                                 76.80% 67.30%            
Expected option life in years                                 4 years 7 months 6 days 5 years            
Share based compensation | $                                 $ 4,441,000 $ 789,000            
Warrants outstanding                                   18,707,780            
Description of warrants                 On November 13, 2024, the Company closed a non-brokered private placement (the “November 2024 Private Offering”), pursuant to binding subscription agreements with certain accredited investors as part of a non-brokered private placement of 2,199,602 units of the Company (the “November 2024 Units”). Each November 2024 Unit consisted of one Common Share, one Warrant (a “Series A Private Warrant”) to purchase one Common Share, and one-half of one Warrant (each whole such Warrant, a “Series B Private Warrant” and, together with the Series A Private Warrants, the “November 2024 Private Warrants”), with each Series B Private Warrant entitling the holder thereof to purchase one additional Common Share. Each November 2024 Unit was issued and sold at a price of $1.57. The gross proceeds of the November 2024 Private Offering were approximately $3,500 before deducting offering expenses. Certain directors and officers of the Company (the “Insider Investors”) purchased November 2024 Units at a price of $1.7675 per November 2024 Unit, which price includes $0.1975 per November 2024 Private Warrant and allowed such directors and officers to participate in the November 2024 Private Offering in accordance with the rules of the Nasdaq. The Series A Private Warrants have an exercise price of $1.75 per underlying Common Share, are exercisable immediately, and will expire on November 13, 2026. The Series B Private Warrants have an exercise price of $2.07 per underlying Common Share, are exercisable beginning six months and one day from the date of issuance and will expire on November 13, 2029. The Company recorded a non-cash expense of $34 and $110 to other operating expenses and employee related costs, respectively, representing the excess of fair value of the November 2024 Units over the purchase price paid by Insider Investors.   On November 5, 2024, the Company closed an underwritten public offering (the “November 2024 Registered Offering”), pursuant to the underwriting agreement, dated November 3, 2024 (the “November 2024 Underwriting Agreement”), with Maxim, as underwriter, which consisted of 1,592,356 Common Shares, 1,672,090 Warrants (the “Series A Public Warrants”) to purchase up to an additional 1,672,090 Common Shares and 836,045 Warrants (the “Series B Public Warrants” and, together with the Series A Public Warrants, the “November 2024 Public Warrants”) to purchase up to an additional 836,045 Common Shares. Each Common Share was sold together with one Series A Public Warrant and one-half of one Series B Public Warrant at a combined public offering price of $1.57. The gross proceeds from the November 2024 Registered Offering were $2,501 before deducting underwriting discounts and offering expenses. The November 2024 Public Warrants were classified as equity instruments and accordingly, the net proceeds were allocated based on the relative fair values of the Common Shares and the November 2024 Public Warrants on the date of issuance, with $943 allocated to the fair value of the November 2024 Public Warrants and the balance of the proceeds of $1,558 allocated to Common Shares. The Company incurred total transaction costs related to the November 2024 Registered Offering of $1,226, which were treated as share issuance costs at closing. The Series A Public Warrants have an exercise price of $1.75 per underlying Common Share, are exercisable immediately, and will expire on November 5, 2026. The Series B Public Warrants have an exercise price of $2.07 per underlying Common Share, are exercisable beginning six months and one day from the date of issuance and will expire on November 5, 2029. In addition, pursuant to the November 2024 Underwriting Agreement, the Company granted Maxim a 45-day over-allotment option to purchase (i) 238,853 additional Common Shares and (ii) 358,280 Option Warrants (as defined below) to purchase up to an aggregate of 358,280 Common Shares. “Option Warrant” means one Series A Public Warrant combined with one-half of one Series B Public Warrant. On November 4, 2024, Maxim partially exercised its over-allotment option to purchase 79,734 additional Series A Public Warrants and 39,867 additional Series B Public Warrants, which amounts are included in the amounts discussed above and were issued at closing of the November 2024 Registered Offering.                          
Common share exercise price, per share | $ / shares                                 $ 9.94              
Fair value of non operating gain/loss | $                                 $ 1,928,000              
Registered Offering | $                               $ 799,000           $ 161,000    
Private Offering | $                                           $ 60,000    
Other operating expenses | $                   $ 34,000                            
Employee related costs | $                   $ 110,000                            
Percentage of Warrant Exercise on Ownership of Common Shares                 19.90% 19.90%                            
Exchange of 2023 Private Warrants for 2023 Public Warrants                                 NioCorp Assumed Warrant Agreement, through June 30, 2026, a total of 3,447,246 2023 Private Warrants were exchanged for 2023 Public Warrants. The Company recorded a non-cash loss of $1,217 and $26 for the years ending June 30, 2026 and 2025, respectively, in change in fair value of warrant liabilities in the consolidated statement of operations, representing the change in fair value of the 2023 Private Warrants through the respective exercise dates.              
Number of Warrants Exchanged                                 3,447,246              
Stock issued, shares                       2,816,742                        
Non-cash loss | $                                 $ 1,217,000 $ 26,000            
Number of shares exercised                                 567,000 512            
Fair value adjustment for warrants exercised | $                                 $ 0 $ 144,000            
Beneficial ownership percentage   20.00%                                            
April 2024 Warrants [Member]                                                
Accumulated Other Comprehensive Income (Loss) [Line Items]                                                
Fair value adjustment for warrants exercised | $                                 $ (1,807,000)              
Private Placement [Member]                                                
Accumulated Other Comprehensive Income (Loss) [Line Items]                                                
Shares issue                 2,199,602                              
Over Allotment Option [Member]                                                
Accumulated Other Comprehensive Income (Loss) [Line Items]                                                
Additional common shares authorised               323,504     238,853                          
Warrants issued                     358,280                          
Purchase Agreement [Member]                                                
Accumulated Other Comprehensive Income (Loss) [Line Items]                                                
Common share exercise price, per share | $ / shares                         $ 3.25 $ 3.25                    
Number of shares exercised                           615,385                    
Warrant determination percentage                         25.00% 25.00%                    
Lind Global Asset Management III, LLC [Member]                                                
Accumulated Other Comprehensive Income (Loss) [Line Items]                                                
Contingent consideration description                                 As consideration for entering into the previously publicly disclosed Waiver and Consent Agreement, dated September 25, 2022 (the “Lind Consent”), between the Company and Lind Global Asset Management III, LLC (“Lind III”), Lind III received, amongst other things, the right to receive additional Warrants (the “Contingent Consent Warrants”) if on September 17, 2024, the closing trading price of the Common Shares on the Toronto Stock Exchange or such other stock exchange on which such shares may then be listed, is less than C$10.00, subject to adjustments. The number of Contingent Consent Warrants to be issued, if any, is based on the Canadian dollar equivalent (based on the then current Canadian to U.S. dollar exchange rate as reported by Bloomberg, L.P.) of $5,000 divided by the five-day volume weighted average price of the Common Shares on the date of issuance. Further, the number of Contingent Consent Warrants issued would be proportionately adjusted based on the percentage of Warrants currently held by Lind III that are exercised, if any, prior to the issuance of any Contingent Consent Warrants.              
Unsecured Debt [Member]                                                
Accumulated Other Comprehensive Income (Loss) [Line Items]                                                
Aggregate principal amount | $                         $ 8,000,000                      
November 2024 Registered Offering [Member]                                                
Accumulated Other Comprehensive Income (Loss) [Line Items]                                                
Common stock, shares issued                     1,592,356                          
Combined public offering price per unit | $                     $ 1.57                          
Gross proceeds from offering | $                     2,501,000                          
Transaction cost | $                     $ 1,226,000                          
Common stock share purchased                     358,280                          
November 2024 Private Offering [Member]                                                
Accumulated Other Comprehensive Income (Loss) [Line Items]                                                
Combined public offering price per unit | $                 $ 1.57 $ 1.57                            
Gross proceeds from offering | $                   $ 3,500,000                            
November 2024 Private Warrant [Member]                                                
Accumulated Other Comprehensive Income (Loss) [Line Items]                                                
Offering price of common shares issued in offering | $ / shares                 $ 0.1975 $ 0.1975                            
January 2025 Offering [Member]                                                
Accumulated Other Comprehensive Income (Loss) [Line Items]                                                
Number of share outstanding                               1,288,660                
Combined public offering price per unit | $                               $ 1.94                
Gross proceeds from offering | $                               $ 5,000,000                
Warrants outstanding                               1,288,660                
April 2025 Offering [Member]                                                
Accumulated Other Comprehensive Income (Loss) [Line Items]                                                
Common stock, shares issued             6,628,846                                  
Offering price of common shares issued in offering | $ / shares             $ 2.5999                                  
Net Proceeds | $               $ 18,076,000                                
Number of share outstanding             1,063,462                                  
Gross proceeds from offering | $               20,841,000                                
Net proceeds | $               2,765,000                                
Transaction costs | $               $ 2,102,000                                
Warrants outstanding             1,063,462                                  
GXII Warrants [Member]                                                
Accumulated Other Comprehensive Income (Loss) [Line Items]                                                
Number of share outstanding                             9,999,959                  
Warrants outstanding                             9,999,959                  
G X I I Private Warrants [Member]                                                
Accumulated Other Comprehensive Income (Loss) [Line Items]                                                
Number of share outstanding                             5,666,667                  
Warrants outstanding                             5,666,667                  
Lind Consent Warrant Issuance [Member]                                                
Accumulated Other Comprehensive Income (Loss) [Line Items]                                                
Common share exercise price, per share | $ / shares                       $ 2.308                        
Stock and Warrants Issued During Period, Value, Preferred Stock and Warrants | $                       $ 5,000,000                        
Warrant [Member]                                                
Accumulated Other Comprehensive Income (Loss) [Line Items]                                                
Issuance of warrants 2,600,000   5,925,000 2,755,260                                        
Offering price per share | $ / shares $ 4.9999   $ 9.3399 $ 6.1499                                        
Number of share outstanding                                 18,707,780 29,985,922           18,563,561
Warrants outstanding                                 18,707,780 29,985,922           18,563,561
Description of warrants                             Each NioCorp Assumed Warrant entitles the holder to the right to purchase 1.11829212 Common Shares at an exercise price of $11.50 per 1.11829212 Common Shares (subject to adjustments for stock splits, stock dividends, reorganizations, recapitalizations and the like).                  
Common share exercise price, per share | $ / shares                                   $ 7.06           $ 10.53
Common Stock [Member]                                                
Accumulated Other Comprehensive Income (Loss) [Line Items]                                                
Gross proceeds from offering | $                     $ 1,558                          
Warrant exchange ratio                                 1.11829%              
Remaining proceeds from private warrants | $                               $ 2,800,000 $ 1,573,000              
Number of shares exercised                                 486,452 512            
November 2024 Public Warrants [Member]                                                
Accumulated Other Comprehensive Income (Loss) [Line Items]                                                
Gross proceeds from offering | $                     $ 943,000                          
January 2025 Series A Warrants [Member]                                                
Accumulated Other Comprehensive Income (Loss) [Line Items]                                                
Number of share outstanding                               2,577,320                
Warrant exercise price | $ / shares             $ 0.0001                 $ 1.98                
Warrants outstanding                               2,577,320                
January 2025 Series B Warrants [Member]                                                
Accumulated Other Comprehensive Income (Loss) [Line Items]                                                
Warrant exercise price | $ / shares                               $ 2.05                
January 2025 Warrants [Member]                                                
Accumulated Other Comprehensive Income (Loss) [Line Items]                                                
Gross proceeds from offering | $                               $ 2,200,000                
Series A Public Warrants [Member]                                                
Accumulated Other Comprehensive Income (Loss) [Line Items]                                                
Issuance of warrants                     1,672,090                          
Number of share outstanding                     1,672,090                          
Warrant exercise price | $ / shares                     $ 1.75                          
Warrants outstanding                     1,672,090                          
Series A Public Warrants [Member] | Over Allotment Option [Member]                                                
Accumulated Other Comprehensive Income (Loss) [Line Items]                                                
Warrants issued                                             79,734  
Series B Public Warrants [Member]                                                
Accumulated Other Comprehensive Income (Loss) [Line Items]                                                
Issuance of warrants                     836,045                          
Number of share outstanding                     836,045                          
Warrant exercise price | $ / shares                     $ 2.07                          
Warrants outstanding                     836,045                          
Series B Public Warrants [Member] | Over Allotment Option [Member]                                                
Accumulated Other Comprehensive Income (Loss) [Line Items]                                                
Warrants issued                                             39,867  
Series A Private Warrants [Member]                                                
Accumulated Other Comprehensive Income (Loss) [Line Items]                                                
Warrant exercise price | $ / shares                   1.75                            
Series A Warrants [Member]                                                
Accumulated Other Comprehensive Income (Loss) [Line Items]                                                
Issuance of warrants                               2,577,320                
Series B Warrants [Member]                                                
Accumulated Other Comprehensive Income (Loss) [Line Items]                                                
Issuance of warrants                               1,288,660                
Series B Private Warrants [Member]                                                
Accumulated Other Comprehensive Income (Loss) [Line Items]                                                
Warrant exercise price | $ / shares                   $ 2.07                            
February 2026 Pre-Funded Warrants [Member]                                                
Accumulated Other Comprehensive Income (Loss) [Line Items]                                                
Common stock, shares issued 2,599,951                                   2,599,951          
Pre-Funded Warrants [Member]                                                
Accumulated Other Comprehensive Income (Loss) [Line Items]                                                
Issuance of warrants             1,063,462                                  
Number of share outstanding 2,600,000                                              
Warrants outstanding 2,600,000                                              
2023 Public Warrants                                                
Accumulated Other Comprehensive Income (Loss) [Line Items]                                                
Number of share outstanding                                 13,447,105              
Warrants outstanding                                 13,447,105              
Description of warrants                                 (ii) the last reported sale price of the Common Shares equals or exceeds approximately $16.10 per share (as adjusted for stock splits, stock dividends, reorganizations, recapitalizations and the like) for any 20 trading days within a 30-trading day period ending on the third business day prior to the date on which the Company sends the notice of redemption to the Warrant holders              
Common share exercise price, per share | $ / shares                                 $ 0.01              
Redemption notice period days                                 30 days              
Stock price threshold | $ / shares                                 $ 16.1              
Requirement of trading days | TradingDays                                 20              
Warrant Liability [Member]                                                
Accumulated Other Comprehensive Income (Loss) [Line Items]                                                
Gain on issuance of Warrants | $                                 $ 103,000 $ (103,000)            
Fair value adjustment for warrants exercised | $                       $ 2,262,000           $ (2,262,000)