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Note 3 - Debt Securities - Securities by Contractual Maturity (Details) $ in Thousands	Sep. 30, 2020 USD ($)
Securities available for sale, due within one year, amortized cost	$ 0
Securities available for sale, due within one year, fair value	0
Securities available for sale, due after one year but within five years, amortized cost	28,495
Securities available for sale, due after one year but within five years, fair value	28,749
Securities available for sale, due after five years but within ten years, amortized cost	27,117
Securities available for sale, due after five years but within ten years, fair value	27,490
Securities available for sale, due after ten years, amortized cost	0
Securities available for sale, due after ten years, fair value	0
Securities available for sale, single maturity date, amortized cost	55,612
Securities available for sale, single maturity date, fair value (US	56,239
Total debt securities available for sale, amortized cost	89,388
Total debt securities available for sale, fair value	90,972
Collateralized Mortgage Backed Securities [Member]
Securities available for sale, no single maturity date, amortized cost	33,776
Securities available for sale, no single maturity date, fair value	$ 34,733

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

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