Note 2 - Summary of Significant Accounting Policies - Schedule of Error Corrections and Prior Period Adjustments (Details) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Inventory write-downs and other asset write-offs	$ 4,326	$ 7,499
Inventories	(6,030)	8,238
Accrued compensation and tax withholdings	(2,379)	(7,831)
Other assets and liabilities	12,752	1,379
Net cash provided by operating activities	44,201	22,371
Purchases of property, plant and equipment	(15,158)	(19,542)
Net cash used in investing activities	(61,586)	(173,009)
Proceeds from issuance of common stock	1,553	1,678
Net cash used in financing activities	(10,280)	(185,542)
Effects of exchange rate changes on cash, cash equivalents and restricted cash	(4,459)	16,255
Purchases of property, plant and equipment included in accounts payable and accrued expenses	$ 5,773	2,270
Previously Reported [Member]
Inventory write-downs and other asset write-offs		6,966
Inventories		7,975
Accrued compensation and tax withholdings		(6,153)
Other assets and liabilities		12,913
Net cash provided by operating activities		34,787
Purchases of property, plant and equipment		(18,746)
Net cash used in investing activities		(172,213)
Proceeds from issuance of common stock		0
Net cash used in financing activities		(187,220)
Effects of exchange rate changes on cash, cash equivalents and restricted cash		4,721
Purchases of property, plant and equipment included in accounts payable and accrued expenses		0
Revision of Prior Period, Adjustment [Member]
Inventory write-downs and other asset write-offs		533
Inventories		263
Accrued compensation and tax withholdings		(1,678)
Other assets and liabilities		(11,534)
Net cash provided by operating activities		(12,416)
Purchases of property, plant and equipment		(796)
Net cash used in investing activities		(796)
Proceeds from issuance of common stock		1,678
Net cash used in financing activities		1,678
Effects of exchange rate changes on cash, cash equivalents and restricted cash		11,534
Purchases of property, plant and equipment included in accounts payable and accrued expenses		$ 2,270