Note 12 - Fair Value Measurements (Details Textual) - USD ($) $ in Thousands		3 Months Ended			6 Months Ended
	Oct. 02, 2024	Mar. 31, 2025	Jun. 30, 2024	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024
Fair Value, Nonrecurring [Member]
Asset Impairment Charges		$ 0		$ 0	$ 0	$ 0
Conversion from Convertible Notes to Preferred Stock, Principal and Interest [Member]
Debt Conversion, Converted Instrument, Shares Issued (in shares)	420,000
Private Company [Member]
Convertible Debt, Fair Value Disclosures		2,100			2,100
Convertible Debt Securities [Member] | Private Company [Member]
Payments to Acquire Equity Securities, FV-NI			$ 2,000
Equity Securities, FV-NI		$ 2,100			$ 2,100