Note 7 - Intangible Assets (Details Textual) - USD ($) $ in Millions	3 Months Ended		15 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024
Amortization Expense of Intangible Assets	$ 1.2	$ 1.5
Tris Karbinal Agreement [Member]
Supply and Distribution Agreement, Extension Term (Year)			20 years
Minimum [Member]
Finite-Lived Intangible Asset, Useful Life, Renewable Period (Year)	1 year
Maximum [Member]
Finite-Lived Intangible Asset, Useful Life, Renewable Period (Year)	20 years