v3.26.1
FAIR VALUE MEASURES - Roll forward of Financial Liabilities (Details) - Level 3 - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2024
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Beginning Balance $ 22,267 $ 1,148 $ 1,148 $ 1,636
Issuance of convertible promissory notes 4,300 10,000 10,000  
Financing costs related to issuance of convertible promissory notes     4,500  
Change in fair value 1,813 6,619 6,619 (488)
Ending balance 28,380 22,267 22,267 1,148
Warrant liability Series B-1        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Beginning Balance 608 114 114 165
Change in fair value 73 494 494 (51)
Ending balance 681 608 608 114
Warrant liability Series D        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Beginning Balance 2,770 1,034 1,034 1,471
Change in fair value 33 1,736 1,736 (437)
Ending balance 2,803 2,770 2,770 $ 1,034
Convertible Promissory Notes        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Beginning Balance 18,889      
Issuance of convertible promissory notes 4,300   10,000  
Financing costs related to issuance of convertible promissory notes     4,500  
Change in fair value 300   4,389  
Ending balance $ 4,600 $ 18,889 $ 18,889