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Note 2 - Debt Securities - Securities by Contractual Maturity (Details) $ in Thousands	Mar. 31, 2021 USD ($)
Securities available for sale, due within one year, amortized cost	$ 980
Securities available for sale, due within one year, fair value	982
Securities available for sale, due after one year but within five years, amortized cost	28,688
Securities available for sale, due after one year but within five years, fair value	28,902
Securities available for sale, due after five years but within ten years, amortized cost	10,991
Securities available for sale, due after five years but within ten years, fair value	11,141
Securities available for sale, single maturity date, amortized cost	40,659
Securities available for sale, single maturity date, fair value (US	41,025
Total debt securities available for sale, amortized cost	87,061
Total debt securities available for sale, fair value	87,643
Collateralized Mortgage Backed Securities [Member]
Securities available for sale, no single maturity date, amortized cost	46,402
Securities available for sale, no single maturity date, fair value	$ 46,618

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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