Note 1 - Significant Accounting Policies (Details Textual) $ in Thousands	3 Months Ended
	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Sep. 30, 2024 USD ($)
Cash and Cash Equivalents, at Carrying Value	$ 1,410		$ 6,895
Credit Terms for Trade Receivables (Day)	30 days
Extended Credit Terms for Trade Receivables (Day)	60 days
Customer One [Member]
Accounts and Financing Receivable, after Allowance for Credit Loss	$ 22,500
Revenue from Contract with Customer, Including Assessed Tax	$ 18,700	$ 31,700
Accounts Receivable [Member] | Customer Concentration Risk [Member]
Number of Major Customers	1
Revenue from Contract with Customer Benchmark [Member] | Customer Concentration Risk [Member]
Number of Major Customers	1
Subsidiaries [Member] | Non-US [Member]
Cash and Cash Equivalents, at Carrying Value	$ 900		$ 1,100