FAIR VALUE MEASUREMENT (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Sep. 30, 2024
Assets:
Short-term investments:	$ 38,858	$ 36,884
Long-term investments:	3,464	11,410
Total assets at fair value	42,322	48,294
U.S. Treasury
Assets:
Short-term investments:		3,836
Commercial paper
Assets:
Short-term investments:	19,575	15,984
U.S. Government and agency securities, short-term
Assets:
Short-term investments:	998
Corporate debt securities
Assets:
Short-term investments:	18,285	17,064
Long-term investments:	3,464	11,410
Quoted Prices in Active Markets (Level 1)
Assets:
Short-term investments:	0	0
Long-term investments:	0	0
Total assets at fair value	0	0
Quoted Prices in Active Markets (Level 1) | U.S. Treasury
Assets:
Short-term investments:		0
Quoted Prices in Active Markets (Level 1) | Commercial paper
Assets:
Short-term investments:	0	0
Quoted Prices in Active Markets (Level 1) | U.S. Government and agency securities, short-term
Assets:
Short-term investments:	0
Quoted Prices in Active Markets (Level 1) | Corporate debt securities
Assets:
Short-term investments:	0	0
Long-term investments:	0	0
Significant Other Observable Inputs (Level 2)
Assets:
Short-term investments:	38,858	36,884
Long-term investments:	3,464	11,410
Total assets at fair value	42,322	48,294
Significant Other Observable Inputs (Level 2) | U.S. Treasury
Assets:
Short-term investments:		3,836
Significant Other Observable Inputs (Level 2) | Commercial paper
Assets:
Short-term investments:	19,575	15,984
Significant Other Observable Inputs (Level 2) | U.S. Government and agency securities, short-term
Assets:
Short-term investments:	998
Significant Other Observable Inputs (Level 2) | Corporate debt securities
Assets:
Short-term investments:	18,285	17,064
Long-term investments:	3,464	11,410
Significant Unobservable Inputs (Level 3)
Assets:
Short-term investments:	0	0
Long-term investments:	0	0
Total assets at fair value	0	0
Significant Unobservable Inputs (Level 3) | U.S. Treasury
Assets:
Short-term investments:		0
Significant Unobservable Inputs (Level 3) | Commercial paper
Assets:
Short-term investments:	0	0
Significant Unobservable Inputs (Level 3) | U.S. Government and agency securities, short-term
Assets:
Short-term investments:	0
Significant Unobservable Inputs (Level 3) | Corporate debt securities
Assets:
Short-term investments:	0	0
Long-term investments:	$ 0	$ 0