Note 5 - Investment Securities - Schedule of Investments By Contractual Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Jun. 30, 2021
Due in one year or less, available for sale, amortized cost	$ 61,935
Due after one through five years, available for sale, amortized cost	73,723
Due after five through ten years, available for sale, amortized cost	468
Due after ten years, available for sale, amortized cost	0
Investment securities available-for-sale, amortized cost	136,126	$ 150,886
Due in one year or less, available for sale, fair value	61,835
Due after one through five years, available for sale, fair value	73,016
Due after five through ten years, available for sale, fair value	436
Due after ten years,, available for sale, fair value	0
Investment securities available-for-sale (amortized cost of $136,126 and $150,886)	135,287	151,577
Due in one year or less, held to maturity, amortized cost	1,185
Due after one through five years, held to maturity, amortized cost	1,020
Due after five through ten years, held to maturity, amortized cost	7,749
Due after ten years, held to maturity, amortized cost	0
Investment securities held-to-maturity (fair value of $9,545 and $15,592)	9,954	15,489
Due in one year or less, held to maturity, fair value	1,198
Due after one through five years, held to maturity, fair value	1,035
Due after five through ten years, held to maturity, fair value	7,312
Due after ten years, held to maturity, fair value	0
Investment securities held-to-maturity, fair value	$ 9,545	$ 15,592