v3.26.1
Summary of Significant Accounting Policies - Schedule of Basic and Diluted Net Income Per Ordinary Share (Details) - USD ($)
 3 Months Ended 7 Months Ended 12 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Mar. 31, 2025
Dec. 31, 2024
Dec. 31, 2025
Numerator:          
Allocation of net income, Basic $ (139,635) $ (145,382)      
Allocation of net income, Diluted $ (139,635) $ (145,382)      
Denominator:          
Weighted average shares outstanding, basic 1,000 1,000      
Weighted average shares outstanding, diluted 1,000 1,000      
Basic net income per common stock $ (139.64) $ (145.38)      
Diluted net income per common stock $ (139.64) $ (145.38)      
Mountain Lake Acquisition Corp. | Class A          
Numerator:          
Allocation of net income, Basic $ 1,324,198   $ 1,550,404 $ 99,286 $ 6,361,272
Allocation of net income, Diluted $ 1,324,198   $ 1,550,404 $ 93,012 $ 6,361,272
Denominator:          
Weighted average shares outstanding, basic 23,805,000   23,805,000 1,785,375 23,805,000
Weighted average shares outstanding, diluted 23,805,000   23,805,000 1,785,375 23,805,000
Basic net income per common stock $ 0.06   $ 0.07 $ 0.06 $ 0.27
Diluted net income per common stock $ 0.06   $ 0.07 $ 0.05 $ 0.27
Mountain Lake Acquisition Corp. | Class B Ordinary Shares          
Numerator:          
Allocation of net income, Basic $ 399,818   $ 468,117 $ 343,831 $ 1,920,674
Allocation of net income, Diluted $ 399,818   $ 468,117 $ 350,105 $ 1,920,674
Denominator:          
Weighted average shares outstanding, basic 7,187,500   7,187,500 6,182,813 [1] 7,187,500 [1]
Weighted average shares outstanding, diluted 7,187,500   7,187,500 6,720,313 [1] 7,187,500 [1]
Basic net income per common stock $ 0.06   $ 0.07 $ 0.06 $ 0.27
Diluted net income per common stock $ 0.06   $ 0.07 $ 0.05 $ 0.27
[1] Excluded up to 984,375 shares subject to forfeiture for the period from June 14, 2024 (inception) through December 31, 2024, if the over-allotment option was not exercised in full or in part by the underwriters. On December 16, 2024, the underwriters partially exercised their over-allotment option as part of the closing of the Initial Public Offering and forfeited their option to exercise the remaining over-allotment option. As such, 359,375 Founder Shares were forfeited (Note 5).