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Note 3 - Short-term Investments (Tables)

6 Months Ended

Mar. 31, 2025

Notes Tables

Schedule of Available-for-Sale Securities Reconciliation [Table Text Block]

		*As of March 31, 2025*
		*Amortized Cost*				*Unrealized Gains*				*Unrealized Losses*				*Estimated Fair Value*
Short-term investments:
Corporate bonds		$	9,281			$	—			$	(2	)		$	9,279
U.S. treasury securities and securities of U.S. government-sponsored agency			2,250				2				—				2,252
Total		$	11,531			$	2			$	(2	)		$	11,531

		*As of September 30, 2024*
		*Amortized Cost*				*Unrealized Gains*				*Unrealized Losses*				*Estimated Fair Value*
Short-term investments:
Corporate bonds		$	21,814			$	35			$	—			$	21,849
U.S. treasury securities and securities of U.S. government-sponsored agency			8,356				22				—				8,378
Total		$	30,170			$	57			$	—			$	30,227