Note 15 - Segment and Geographic Information - Schedule of Long-lived Assets by Geographic Area (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Sep. 30, 2025
Total long-lived assets, net	$ 209,784	$ 208,002
UNITED STATES
Total long-lived assets, net	119,767	116,681
CHINA
Total long-lived assets, net	56,931	56,715
Europe [Member]
Total long-lived assets, net	29,707	31,012
Asia Pacific [Member]
Total long-lived assets, net	3,306	3,505
Other [Member]
Total long-lived assets, net	$ 73	$ 89