v3.26.1
Cover - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Mar. 31, 2026
Jun. 30, 2025
Document Information [Line Items]      
Document Type 10-K/A    
Document Annual Report true    
Document Transition Report false    
Document Financial Statement Error Correction [Flag] false    
Entity Interactive Data Current Yes    
ICFR Auditor Attestation Flag false    
Amendment Flag true    
Amendment Description This Amendment No. 1 on Form 10-K/A (this “Amendment”) amends and supplements the Annual Report on Form 10-K of Greenland Mines Ltd (the “Company”) for the fiscal year ended December 31, 2025, originally filed with the Securities and Exchange Commission (the “SEC”) on April 1, 2026 (the “Original Filing”).This Amendment is being filed to revise certain disclosures in the Original Filing in connection with the Company’s responses to comment letters received from the Staff of the SEC’s Division of Corporation Finance dated April 21, 2026, June 17, 2026, and July 17, 2026. This Amendment amends the following portions of the Original Filing:Item 1. Business: the disclosure regarding the development timeline for the KLTO-202 and KLTO-101 product candidates, the University of Heidelberg license, and the Reliance Life Sciences license arrangements;Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations: the Results of Operations discussion of Professional Fees, General and Administrative Expenses, and Research and Development Expenses for the years ended December 31, 2025 and 2024;Item 8. Financial Statements and Supplementary Data: the Consolidated Statements of Operations, the Consolidated Statements of Changes in Stockholders’ Equity, Note 4 (Intangible Assets), and the Warrants disclosure, each for the years ended December 31, 2025 and 2024.Except as described above, this Amendment does not amend, and should not be interpreted to amend, any other item or portion of the Original Filing, and does not reflect events occurring after the filing date of the Original Filing. Accordingly, this Amendment should be read together with the Original Filing and the Company’s other filings with the SEC.As required by Rule 12b-15 under the Securities Exchange Act of 1934, new certifications of the Company’s principal executive officer and principal financial officer are filed as exhibits to this Amendment.This Amendment sets forth the full text of the Original Filing, marked to reflect the revisions described above; Items and disclosures not identified above are unchanged from the Original Filing.    
Document Period End Date Dec. 31, 2025    
Document Fiscal Year Focus 2025    
Document Fiscal Period Focus FY    
Entity Information [Line Items]      
Entity Registrant Name GREENLAND MINES LTD    
Entity Central Index Key 0001907223    
Entity File Number 001-41340    
Entity Tax Identification Number 86-2727441    
Entity Incorporation, State or Country Code DE    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Shell Company false    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company true    
Entity Ex Transition Period false    
Entity Public Float     $ 52.6
Entity Contact Personnel [Line Items]      
Entity Address, Address Line One 1300 South Boulevard    
Entity Address, Address Line Two Unit D    
Entity Address, City or Town Charlotte    
Entity Address, State or Province NC    
Entity Address, Postal Zip Code 28203    
Entity Phone Fax Numbers [Line Items]      
City Area Code (833)    
Local Phone Number 931-6330    
Entity Listings [Line Items]      
Entity Common Stock, Shares Outstanding   121,238,660  
Common Stock      
Entity Listings [Line Items]      
Title of 12(b) Security Common Stock    
Trading Symbol GRML    
Security Exchange Name NASDAQ    
Warrants      
Entity Listings [Line Items]      
Title of 12(b) Security Warrants    
Trading Symbol GRMLW    
Security Exchange Name NASDAQ