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Note 10 - Borrowings (Details Textual) |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Jun. 29, 2018 USD ($) | Sep. 30, 2015 USD ($) | Jun. 30, 2014 USD ($) | Sep. 30, 2016 USD ($) | Jun. 30, 2009 | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2003 USD ($) | Dec. 22, 2016 USD ($)
Long-term Debt, Total |  |  |  |  |  | $ 120,813,000 | $ 130,900,000 |  |  |
Advances from Federal Home Loan Banks, Total |  |  |  |  |  | 90,000,000 | 100,000,000 |  |  |
Federal Home Loan Bank, Advances, Maturities Summary, Fixed Rate, Total |  |  |  |  |  | $ 90,000,000 |  |  |  |
Federal Home Loan Bank, Advances, Activity for Year, Average Interest Rate for Year |  |  |  |  |  | 3.26% |  |  |  |
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged |  |  |  |  |  | $ 267,500,000 |  |  |  |
Federal Home Loan Bank, Advances, General Debt Obligations, Amount of Available, Unused Funds |  |  |  |  |  | 78,400,000 |  |  |  |
Debt Issuance Costs, Net, Total |  |  |  |  |  | 429,000 |  |  |  |
Amortization of Debt Issuance Costs |  |  |  |  |  | 112,000 | 112,000 | $ 97,000 |  |
Subordinated Debt, Ending Balance |  |  |  |  |  | 9,782,000 | 9,752,000 |  |  |
Interest Expense, Subordinated Notes and Debentures |  |  |  |  |  | 991,000 | 1,118,000 | 767,000 |  |
Long-term Debt, Gross |  |  |  |  |  | 121,242,000 |  |  |  |
Federal Reserve Bank Advances [Member] |  |  |  |  |  |  |  |  |  |
Loans Pledged as Collateral |  |  |  |  |  | 40,900,000 |  |  |  |
Pledged Assets Separately Reported, Loans Pledged as Collateral, at Fair Value, Total |  |  |  |  |  | 26,300,000 |  |  |  |
Short-term Debt, Total |  |  |  |  |  | 0 |  |  |  |
Correspondent Bank Agreement [Member] | Zions Bank [Member] |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  | 5,000,000 | 5,000,000 |  |  |
Long-term Line of Credit, Total |  |  |  |  |  | 0 | 0 |  |  |
Interest Expense, Debt, Total |  |  |  |  |  | 0 | 2,000 | 13,000 |  |
Federal Home Loan Bank Advances [Member] |  |  |  |  |  |  |  |  |  |
Long-term Debt, Total |  |  |  |  |  | 90,000,000 |  |  |  |
Debt Issuance Costs, Net, Total |  |  |  |  |  |  |  |  |  |
Long-term Debt, Gross |  |  |  |  |  | 90,000,000 |  |  |  |
Senior Notes [Member] |  |  |  |  |  |  |  |  |  |
Long-term Debt, Total |  |  |  |  |  | 11,927,000 |  |  |  |
Debt Instrument, Face Amount |  |  |  |  |  |  |  |  |  | $ 12,000,000
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  |  |  | 7.00%
Debt Issuance Costs, Net, Total |  |  |  |  |  | 73,000 | 147,000 |  |  | $ 374,000
Interest Expense, Long-term Debt, Total |  |  |  |  |  | $ 915,000 | 915,000 | 915,000 |  |
Debt Instrument, Interest Rate, Effective Percentage |  |  |  |  |  | 7.60% |  |  |  |
Amortization of Debt Issuance Costs |  |  |  |  |  | $ 75,000 | 75,000 | 75,000 |  |
Long-term Debt, Gross |  |  |  |  |  | 12,000,000 |  |  |  |
Senior Notes [Member] | Accrued Expenses and Other Liabilities [Member] |  |  |  |  |  |  |  |  |  |
Interest Payable |  |  |  |  |  | 23,000 | 23,000 |  |  |
Subordinated Notes [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount | $ 10,000,000 |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 6.25% |  |  |  |  |  |  |  |  |
Subordinated Notes [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 3.325% |  |  |  |  |  |  |  |  |
Subordinated Debt [Member] |  |  |  |  |  |  |  |  |  |
Long-term Debt, Total |  |  |  |  |  | 9,782,000 |  |  |  |
Interest Expense, Debt, Total |  |  |  |  |  | 654,000 | 656,000 | 327,000 |  |
Debt Issuance Costs, Net, Total | $ 291,000 |  |  |  |  | 218,000 | 248,000 |  |  |
Long-term Debt, Gross |  |  |  |  |  | 10,000,000 |  |  |  |
Junior Subordinated Debt [Member] |  |  |  |  |  |  |  |  |  |
Long-term Debt, Total |  |  |  |  |  | 8,110,000 |  |  |  |
Interest Expense, Debt, Total |  |  | $ 1,700,000 | $ 700,000 |  |  |  |  |  |
Debt Issuance Costs, Net, Total |  |  |  |  |  | 138,000 | 146,000 | 154,000 |  |
Amortization of Debt Issuance Costs |  |  |  |  |  | 8,000 | 8,000 |  |  |
Interest Payable |  |  |  |  |  | $ 5,000 | 6,000 |  |  |
Subordinated Debt, Ending Balance |  |  |  |  |  |  |  |  | $ 8,000,000 |
Payments of Debt Issuance Costs |  |  |  |  |  |  |  |  | $ 240,000 |
Excess Tier One Risk Based Capital to Risk Weighted Assets |  |  |  |  |  |  |  |  | 0.25 |
Debt, Weighted Average Interest Rate |  |  |  |  |  | 3.40% |  |  |  |
Number of Consecutive Quarters for Interest Deferment |  |  |  |  | 20 |  |  |  |  |
Interest Expense, Subordinated Notes and Debentures |  |  |  |  |  | $ 337,000 | 462,000 |  |  |
Long-term Debt, Gross |  |  |  |  |  | $ 8,248,000 |  |  |  |
Junior Subordinated Debt [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  |  |  | 3.15% |  |  |  |
Notes Payable, Other Payables [Member] |  |  |  |  |  |  |  |  |  |
Long-term Debt, Total |  |  |  |  |  | $ 994,000 |  |  |  |
Debt Instrument, Term (Year) |  | 9 years |  |  |  |  |  |  |  |
Interest Expense, Debt, Total |  |  |  |  |  | 19,000 | 23,000 | 26,000 |  |
Debt Instrument, Face Amount |  | $ 2,000,000 |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 1.75% |  |  |  |  |  |  |  |
Debt Issuance Costs, Net, Total |  |  |  |  |  |  |  |  |  |
Long-term Debt, Gross |  |  |  |  |  | $ 994,000 | 1,200,000 |  |  |
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid |  | $ 234,000 |  |  |  |  |  |  |  |
Minimum [Member] |  |  |  |  |  |  |  |  |  |
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Interest Rate |  |  |  |  |  | 2.40% |  |  |  |
Minimum [Member] | Federal Home Loan Bank Advances [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument, Term (Year) |  |  |  |  |  | 2 years 182 days |  |  |  |
Maximum [Member] |  |  |  |  |  |  |  |  |  |
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Interest Rate |  |  |  |  |  | 4.23% |  |  |  |
Maximum [Member] | Federal Home Loan Bank Advances [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument, Term (Year) |  |  |  |  |  | 3 years 255 days |  |  |  |
Federal Home Loan Bank Borrowings [Member] |  |  |  |  |  |  |  |  |  |
Long Term Debt, Additional Available Amount |  |  |  |  |  | $ 63,900,000 |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  | 2,000,000 |  |  |  |
Long-term Line of Credit, Total |  |  |  |  |  | 0 | 0 |  |  |
Interest Expense, Debt, Total |  |  |  |  |  | $ 2,700,000 | $ 2,200,000 | $ 1,600,000 |  |

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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Carrying amount as of the balance sheet date of loans that have been pledged as collateral for borrowings. If the secured party has the right by contract or custom to sell or re-pledge the collateral, then the debtor reclassifies that asset and report that asset in its statement of financial position separately from other assets not so encumbered. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66007379&loc=d3e113888-111728 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121611835&loc=d3e5086-111524 + Details
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- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585 + Details
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- Definition The fair value, as of the date of each statement of financial position presented, of loans which are owned but transferred to serve as collateral for the payment of the related debt obligation primarily arising from secured borrowings and repurchase agreements, and that are reclassified and separately reported in the statement of financial position because the transferee has the right by contract or custom to sell or re-pledge them. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66007379&loc=d3e113888-111728 + Details
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- Definition Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)(a)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(1)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(13)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
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- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of subordinated debt (with initial maturities beyond one year or beyond the operating cycle if longer). Subordinated debt places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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