v3.26.1
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - CASH, CASH EQUIVALENTS AND RESTRICTED CASH (Details) - USD ($)
$ in Thousands
Mar. 31, 2026
Sep. 30, 2025
Mar. 31, 2025
Sep. 30, 2024
Accounting Policies [Abstract]        
Cash and cash equivalents $ 125,284 $ 591 $ 83,708  
Restricted cash in other noncurrent assets 1,158 1,058 983  
Cash, cash equivalents and restricted cash $ 126,442 $ 1,649 $ 84,691 $ 1,612