Note 12 - Fair Value Measurements (Tables)

9 Months Ended

Jun. 30, 2024

Notes Tables

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

	As of June 30, 2024
Description	Total Fair Value		Level 1		Level 2		Level 3
Assets:
Cash equivalents	$	147,502	$	147,253	$	249	$	—
Available-for-sale securities		405,382		112,633		292,749		—
Convertible debt securities		2,000		—		—		2,000
Foreign exchange contracts		201		—		201		—
Net investment hedge		834		—		834		—
Total assets	$	555,919	$	259,886	$	294,033	$	2,000

	As of September 30, 2023
Description	Total Fair Value		Level 1		Level 2		Level 3
Assets:
Cash equivalents	$	525,952	$	525,952	$	—	$	—
Available-for-sale securities		450,211		85,949		364,262		—
Foreign exchange contracts		44		—		44		—
Net investment hedge		13,036		—		13,036		—
Total assets	$	989,243	$	611,901	$	377,342	$	—
Liabilities:
Foreign exchange contracts		421	$	—	$	421	$	—
Total liabilities	$	421	$	—	$	421	$	—