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Note 5 - Financial Instruments - Financial Instruments (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Equity securities at fair value (Note 2) | $ 3,804 | $ 2,896
Securities available for sale (Note 2) | 722,627 | 574,787
Loans to other financial institutions | 7,312 | 35,209
Deposits – noninterest-bearing | 515,552 | 477,654
Deposits – interest-bearing | 1,324,412 | 1,196,924
Fair Value, Inputs, Level 1 [Member] |  |
Securities available for sale (Note 2) | 0 |
Fair Value, Inputs, Level 2 [Member] |  |
Securities available for sale (Note 2) | 709,021 |
Fair Value, Inputs, Level 3 [Member] |  |
Securities available for sale (Note 2) | 13,606 |
Reported Value Measurement [Member] |  |
Cash and cash equivalents | 135,328 | 79,519
Equity securities at fair value (Note 2) | 3,804 | 2,896
Securities available for sale (Note 2) | 722,627 | 574,787
Federal Home Loan Bank and Federal Reserve Bank stock | 8,004 | 8,004
Loans held for sale | 18,736 | 12,921
Loans to other financial institutions | 7,312 | 35,209
Loans, net | 1,027,343 | 1,062,075
Accrued interest receivable | 7,751 | 6,521
Interest rate lock commitments | 1,756 | 842
Deposits – noninterest-bearing | 515,552 | 477,654
Deposits – interest-bearing | 1,324,412 | 1,196,924
Borrowings | 3,484 |
Subordinated debentures | 3,115 | 3,089
Accrued interest payable | 129 | 183
Borrowings |  | 9,327
Estimate of Fair Value Measurement [Member] |  |
Cash and cash equivalents | 135,328 | 79,519
Equity securities at fair value (Note 2) | 3,804 | 2,896
Securities available for sale (Note 2) | 722,627 | 574,787
Federal Home Loan Bank and Federal Reserve Bank stock | 8,004 | 8,004
Loans held for sale | 19,298 | 13,350
Loans to other financial institutions | 7,312 | 35,209
Loans, net | 1,024,203 | 1,057,786
Accrued interest receivable | 7,751 | 6,521
Interest rate lock commitments | 1,756 | 842
Deposits – noninterest-bearing | 515,552 | 477,654
Deposits – interest-bearing | 1,324,629 | 1,197,964
Borrowings | 3,265 |
Subordinated debentures | 2,918 | 3,089
Accrued interest payable | 129 | 183
Borrowings |  | 9,143
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Cash and cash equivalents | 135,328 | 79,519
Equity securities at fair value (Note 2) | 1,859 | 1,411
Securities available for sale (Note 2) | 0 | 0
Federal Home Loan Bank and Federal Reserve Bank stock | 0 | 0
Loans held for sale | 0 | 0
Loans to other financial institutions | 0 | 0
Loans, net | 0 | 0
Accrued interest receivable | 0 | 0
Interest rate lock commitments | 0 | 0
Deposits – noninterest-bearing | 0 | 0
Deposits – interest-bearing | 0 | 0
Borrowings | 0 |
Subordinated debentures | 0 | 0
Accrued interest payable | 0 | 0
Borrowings |  | 0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Cash and cash equivalents | 0 | 0
Equity securities at fair value (Note 2) | 0 | 0
Securities available for sale (Note 2) | 709,021 | 563,364
Federal Home Loan Bank and Federal Reserve Bank stock | 8,004 | 8,004
Loans held for sale | 19,298 | 13,350
Loans to other financial institutions | 7,312 | 35,209
Loans, net | 0 | 0
Accrued interest receivable | 7,751 | 6,521
Interest rate lock commitments | 1,756 | 842
Deposits – noninterest-bearing | 515,552 | 477,654
Deposits – interest-bearing | 1,324,629 | 1,197,964
Borrowings | 3,265 |
Subordinated debentures | 2,918 | 3,089
Accrued interest payable | 129 | 183
Borrowings |  | 9,143
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Cash and cash equivalents | 0 | 0
Equity securities at fair value (Note 2) | 1,945 | 1,485
Securities available for sale (Note 2) | 13,606 | 11,423
Federal Home Loan Bank and Federal Reserve Bank stock | 0 | 0
Loans held for sale | 0 | 0
Loans to other financial institutions | 0 | 0
Loans, net | 1,024,203 | 1,057,786
Accrued interest receivable | 0 | 0
Interest rate lock commitments | 0 | 0
Deposits – noninterest-bearing | 0 | 0
Deposits – interest-bearing | 0 | 0
Borrowings | 0 |
Subordinated debentures | 0 | 0
Accrued interest payable | $ 0 | 0
Borrowings |  | $ 0

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