Note 7 - Securities Available for Sale - Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Due less than one year, amortized cost	$ 85,676
Due less than one year, fair value	85,595
Due after one year through five years, amortized cost	124,263
Due after one year through five years, fair value	124,119
Due after five years through ten years, amortized cost	24,576
Due after five years through ten years, fair value	24,544
Due after ten years, amortized cost	737
Due after ten years, fair value	681
Total, amortized cost	235,252	$ 146,312
Total, fair value	$ 234,939	$ 148,090

Amortized cost of 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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