Note 19 - Commitments and Contingencies (Details Textual) - USD ($)	Aug. 01, 2025	Jul. 31, 2021	Sep. 30, 2025	Aug. 31, 2025	Sep. 30, 2024
Geovox [Member]
Business Combination, Contingent Consideration, Liability	$ 2,500,000		$ 2,540,000	$ 2,500,000	$ 0
Business Combination, Contingent Consideration, Range of Outcomes, Maximum, Amount	$ 3,300,000			$ 3,300,000
Business Combination, Contingent Consideration, Earn Out Period (Year)	4 years
Aquana, LLC [Member]
Business Combination, Contingent Consideration, Liability			$ 100,000		$ 17,000
Business Combination, Contingent Consideration, Earn Out Period (Year)		7 years
Business Combination, Required Continued Employment of Key Employees, Period (Year)		5 years