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Note 5 - Fair Value Measurements (Tables)

3 Months Ended

Dec. 31, 2023

Notes Tables

Fair Value Measurements, Recurring and Nonrecurring [Table Text Block]

			Fair Value Measurements at December 31, 2023
Financial Assets	Balance Sheet Location		Level 1				Level 2				Level 3				Total
Corporate money market funds (1)	Cash and cash equivalents		$	16,363			$	-			$	-			$	16,363
U.S. Treasury bills (2)	Investments			-				97,679				-				97,679
U.S. Treasury notes (2)	Other Assets			-				15,064				-				15,064
Total			$	16,363			$	112,743			$	-			$	129,106

			Fair Value Measurements at June 30, 2023
Financial Assets	Balance Sheet Location		Level 1				Level 2				Level 3				Total
Corporate money market funds (1)	Cash and cash equivalents		$	23,923			$	-			$	-			$	23,923
U.S. Treasury bills (2)	Investments			-				110,577				-				110,577
Total			$	23,923			$	110,577			$	-			$	134,500

Debt Securities, Available-for-Sale [Table Text Block]

		December 31, 2023
Due within one year		$	97,679
Due within one and two years			15,064
Total		$	112,743

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- Definition

Tabular disclosure of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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