Note 3 - Securities - Amortized Cost and Fair Value of Securities Available-for-sale and Securities Held-to-maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Jun. 30, 2020
Available-for-sale securities, amortized cost	$ 165,601	$ 138,525
Available-for-sale securities, gross unrealized gains	4,681	5,411
Available-for-sale securities, gross unrealized losses	(1,223)	(18)
Available-for-sale securities, fair value	169,059	143,918
Held-to-maturity, amortized cost	8,036	3,541
Held-to-maturity, fair value	8,483	3,868
US Government-sponsored Enterprises Debt Securities [Member]
Available-for-sale securities, amortized cost	11,456	10,133
Available-for-sale securities, gross unrealized gains	222	399
Available-for-sale securities, gross unrealized losses	(74)
Available-for-sale securities, fair value	11,604	10,532
US States and Political Subdivisions Debt Securities [Member]
Available-for-sale securities, amortized cost	68,177	60,343
Available-for-sale securities, gross unrealized gains	3,018	3,149
Available-for-sale securities, gross unrealized losses	(153)
Available-for-sale securities, fair value	71,042	63,492
Held-to-maturity, amortized cost	8,036	3,541
Held-to-maturity, gross unrecognized gains	447	327
Held-to-maturity, gross unrecognized losses
Held-to-maturity, fair value	8,483	3,868
US Treasury Securities [Member]
Available-for-sale securities, amortized cost		1,248
Available-for-sale securities, gross unrealized gains		8
Available-for-sale securities, gross unrealized losses
Available-for-sale securities, fair value		1,256
Residential Mortgage Backed Securities [Member]
Available-for-sale securities, amortized cost	72,894	48,645
Available-for-sale securities, gross unrealized gains	1,280	1,515
Available-for-sale securities, gross unrealized losses	(918)	(4)
Available-for-sale securities, fair value	73,256	50,156
Commercial Mortgage Backed Securities [Member]
Available-for-sale securities, amortized cost	2,869	8,444
Available-for-sale securities, gross unrealized gains		55
Available-for-sale securities, gross unrealized losses		(2)
Available-for-sale securities, fair value	2,869	8,497
Collateralized Mortgage Obligations [Member]
Available-for-sale securities, amortized cost	9,705	9,712
Available-for-sale securities, gross unrealized gains	161	285
Available-for-sale securities, gross unrealized losses	(70)	(12)
Available-for-sale securities, fair value	9,796	$ 9,985
Other Debt Obligations [Member]
Available-for-sale securities, amortized cost	500
Available-for-sale securities, gross unrealized gains
Available-for-sale securities, gross unrealized losses	(8)
Available-for-sale securities, fair value	$ 492

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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