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Note 2 - Debt Securities - Securities by Contractual Maturity (Details) $ in Thousands	Mar. 31, 2019 USD ($)
Securities available for sale, due within one year, amortized cost
Securities available for sale, due within one year, fair value
Securities available for sale, due after one year but within five years, amortized cost	17,977
Securities available for sale, due after one year but within five years, fair value	18,188
Securities available for sale, due after five years but within ten years, amortized cost	78,912
Securities available for sale, due after five years but within ten years, fair value	79,887
Securities available for sale, due after ten years, amortized cost
Securities available for sale, due after ten years, fair value
Securities available for sale, single maturity date, amortized cost	96,889
Securities available for sale, single maturity date, fair value	98,075
Total debt securities available for sale, amortized cost	131,740
Total debt securities available for sale, fair value	132,597
Collateralized Mortgage Backed Securities [Member]
Securities available for sale, no single maturity date, amortized cost	34,851
Securities available for sale, no single maturity date, fair value	$ 34,522

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

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