Note 5 - Fair Value Measurements (Tables)

9 Months Ended

Mar. 31, 2024

Notes Tables

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

		Fair Value Measurements at March 31, 2024
Financial Assets	Balance Sheet Location	Level 1		Level 2		Level 3		Total
Corporate money market funds (1)	Cash and cash equivalents	$	27,285	$	-	$	-	$	27,285
U.S. Treasury bills (2)	Investments		-		82,356		-		82,356
U.S. Treasury notes (2)	Other assets		-		34,867		-		34,867
Total		$	27,285	$	117,223	$	-	$	144,508

		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]

	March 31, 2024
	Amortized cost		Gross unrealized gains		Gross unrealized losses			Fair Value
Due within one year	$	79,998	$	2,358	$	-		$	82,356
Due within one and two years		34,907		-		(40	)		34,867
Total	$	114,905	$	2,358	$	(40	)	$	117,223