Note 3 - Securities - Amortized Cost and Fair Value of Securities Available-for-sale and Securities Held-to-maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Jun. 30, 2019
Available-for-sale securities, amortized cost	$ 130,420	$ 142,028
Available-for-sale securities, gross unrealized gains	2,798	2,492
Available-for-sale securities, gross unrealized losses	(136)	(510)
Available-for-sale securities, fair value	133,082	144,010
Held-to-maturity, amortized cost	3,580	3,786
Held-to-maturity, gross unrecognized gains	279	35
Held-to-maturity, gross unrecognized losses
Held-to-maturity, fair value	3,859	3,821
US Government-sponsored Enterprises Debt Securities [Member]
Available-for-sale securities, amortized cost	11,942	19,227
Available-for-sale securities, gross unrealized gains	132	287
Available-for-sale securities, gross unrealized losses	(27)	(1)
Available-for-sale securities, fair value	12,047	19,513
US States and Political Subdivisions Debt Securities [Member]
Available-for-sale securities, amortized cost	55,657	56,405
Available-for-sale securities, gross unrealized gains	1,878	1,557
Available-for-sale securities, gross unrealized losses	(5)	(33)
Available-for-sale securities, fair value	57,530	57,929
Held-to-maturity, amortized cost	3,580	3,786
Held-to-maturity, gross unrecognized gains	279	35
Held-to-maturity, gross unrecognized losses
Held-to-maturity, fair value	3,859	3,821
Residential Mortgage Backed Securities [Member]
Available-for-sale securities, amortized cost	53,058	56,309
Available-for-sale securities, gross unrealized gains	614	450
Available-for-sale securities, gross unrealized losses	(88)	(448)
Available-for-sale securities, fair value	53,584	56,311
Commercial Mortgage Backed Securities [Member]
Available-for-sale securities, amortized cost	1,460
Available-for-sale securities, gross unrealized gains
Available-for-sale securities, gross unrealized losses	(4)
Available-for-sale securities, fair value	1,456
Collateralized Mortgage Obligations [Member]
Available-for-sale securities, amortized cost	8,303	10,087
Available-for-sale securities, gross unrealized gains	174	198
Available-for-sale securities, gross unrealized losses	(12)	(28)
Available-for-sale securities, fair value	$ 8,465	$ 10,257

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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