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FAIR VALUE MEASUREMENTS - Summary of changes in the fair value of level 3 warrant liabilities (Details) - USD ($)
1 Months Ended 3 Months Ended 4 Months Ended 6 Months Ended 12 Months Ended
Dec. 31, 2024
Dec. 16, 2024
Jan. 19, 2024
Sep. 30, 2025
Jun. 30, 2025
Mar. 31, 2025
Nov. 06, 2024
Jul. 12, 2024
Dec. 31, 2024
FAIR VALUE MEASUREMENTS                  
Fair value     $ 1,165,656 $ 979,000 $ 626,560 $ 668,390     $ 1,165,656
Change in fair value       89,000 352,440 (41,830)     (497,266)
Fair value $ 668,390     $ 1,068,000 $ 979,000 $ 626,560     $ 668,390
Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]       Fair Value Adjustment of Warrants Fair Value Adjustment of Warrants Fair Value Adjustment of Warrants     Fair Value Adjustment of Warrants
Convertible Promissory Note                  
FAIR VALUE MEASUREMENTS                  
Fair value     3,676,685 $ 4,648,124 $ 4,475,162 $ 4,479,738     $ 3,676,685
Initial measurement   $ 250,000 250,000   250,000   $ 250,000 $ 250,000  
Change in fair value (196,947)     (5,857) (77,038) (4,576)      
Fair value $ 4,479,738     $ 4,642,267 $ 4,648,124 $ 4,475,162     4,479,738
Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Fair Value Adjustment of Warrants     Fair Value Adjustment of Warrants Fair Value Adjustment of Warrants Fair Value Adjustment of Warrants      
Private Warrant                  
FAIR VALUE MEASUREMENTS                  
Fair value     $ 1,165,656 $ 979,000 $ 626,560 $ 668,390     1,165,656
Change in fair value       89,000 352,440 (41,830)     (497,266)
Fair value $ 668,390     $ 1,068,000 $ 979,000 $ 626,560     $ 668,390