Note 5 - Leases - Maturities of Lease Liabilities (Details) $ in Thousands	Mar. 31, 2023 USD ($)
Statement [Line Items]
2023 (excluding the nine months ended March 31, 2023)	$ 8
2024	31
2025	31
2026	8
2027	0
Total lease payments	78
Less imputed interest	(5)
Total	$ 73