Note 2 - Investments - Reconciliation of Investments Recorded at Fair Value (Details) $ in Thousands	9 Months Ended
	Mar. 31, 2023 USD ($)
Equity Securities [Member]
Statement [Line Items]
Beginning Balance	$ 515
Principal repayments	0
Amortization of day one premium	0
Accretion of bifurcation discount	0
Total gains or losses (realized/unrealized) included in Investment Income (Loss)	(293)
Total gains or losses (realized/unrealized) included in Other Comprehensive Income (Loss)	0
Ending Balance	222
Debt Securities [Member]
Statement [Line Items]
Beginning Balance	10,625
Principal repayments	(2,250)
Amortization of day one premium	(196)
Accretion of bifurcation discount	577
Total gains or losses (realized/unrealized) included in Investment Income (Loss)	1,381
Total gains or losses (realized/unrealized) included in Other Comprehensive Income (Loss)	(2,488)
Ending Balance	$ 7,649