Note 20 - Segment and Geographic Information - Summary of Revenue by Geographic Area (Details) - USD ($)	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Revenues	$ 135,598,000	$ 124,509,000
Asia [Member]
Revenues	51,103,000	26,685,000
CANADA
Revenues	2,015,000	2,703,000
Europe [Member]
Revenues	13,817,000	20,826,000
MEXICO
Revenues	1,959	1,792
South America [Member]
Revenues	2,798,000	8,166,000
UNITED STATES
Revenues	63,061,000	62,611,000
Other [Member]
Revenues	$ 845,000	$ 1,726,000