Note 3 - Fair Value of Financial Instruments (Details Textual) - Geovox [Member] - USD ($) $ in Thousands	Jun. 30, 2026	Sep. 30, 2025	Aug. 31, 2025	Aug. 01, 2025	Sep. 30, 2024
Business Combination, Contingent Consideration, Liability	$ 2,750	$ 2,540	$ 2,500	$ 2,500	$ 0
Business Combination, Contingent Consideration, Range of Outcomes, Maximum, Amount			$ 3,300	$ 3,300

Amount of liability recognized arising from contingent consideration in a business combination.

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Balance Type:	credit
Period Type:	instant