Note 4 - Goodwill and Intangible Assets (Details Textual) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Mar. 31, 2025 USD ($)	Sep. 30, 2023 $ / shares
Number of Reporting Units			1
Amortization of Intangible Assets	$ 125	$ 328	$ 250	$ 705
Impairment of Intangible Assets, Finite-Lived	0	0	0	176
Stock Issued in Exchange for Intangibles [Member]
Shares Issued, Price Per Share (in dollars per share) | $ / shares						$ 8
Finder's Fee Adjustment					$ 500
Finite-Lived Intangible Assets [Member]
Amortization of Intangible Assets	$ 100	$ 300	$ 300	$ 700