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Note 9 - 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, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2003 USD ($) | Dec. 22, 2016 USD ($)
Long-term Debt, Total |  |  |  |  |  | $ 130,983,000 | $ 141,400,000 |  |  |
Advances from Federal Home Loan Banks, Total |  |  |  |  |  | 100,000,000 | 120,000,000 |  |  |
Federal Home Loan Bank, Advances, Maturities Summary, Fixed Rate, Total |  |  |  |  |  | 40,000,000 |  |  |  |
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged |  |  |  |  |  | 258,600,000 |  |  |  |
Debt Issuance Costs, Net, Total |  |  |  |  |  | 653,000 |  |  |  |
Amortization of Debt Issuance Costs |  |  |  |  |  | 97,000 | 82,000 | $ 9,000 |  |
Subordinated Debt, Ending Balance |  |  |  |  |  | 9,723,000 |  |  |  |
Interest Expense, Subordinated Notes and Debentures |  |  |  |  |  | 767,000 | 360,000 | $ 334,000 |  |
Long-term Debt, Gross |  |  |  |  |  | 131,636,000 |  |  |  |
Senior Notes [Member] |  |  |  |  |  |  |  |  |  |
Long-term Debt, Total |  |  |  |  |  | 11,778,000 |  |  |  |
Debt Instrument, Face Amount |  |  |  |  |  |  |  |  |  | $ 12,000,000
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  |  |  | 7.00%
Debt Issuance Costs, Net, Total |  |  |  |  |  | 222,000 | 297,000 |  |  | $ 374,000
Interest Expense, Long-term Debt, Total |  |  |  |  |  | $ 915,000 | $ 915,000 |  |  |
Debt Instrument, Interest Rate, Effective Percentage |  |  |  |  |  | 7.62% | 7.62% |  |  |
Amortization of Debt Issuance Costs |  |  |  |  |  | $ 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 Debt [Member] |  |  |  |  |  |  |  |  |  |
Long-term Debt, Total |  |  |  |  |  | 9,723,000 |  |  |  |
Interest Expense, Debt, Total |  |  |  |  |  | 327,000 |  |  |  |
Debt Issuance Costs, Net, Total | $ 291,000 |  |  |  |  | 277,000 |  |  |  |
Long-term Debt, Gross |  |  |  |  |  | 10,000,000 |  |  |  |
Junior Subordinated Debt [Member] |  |  |  |  |  |  |  |  |  |
Long-term Debt, Total |  |  |  |  |  | 8,094,000 |  |  |  |
Interest Expense, Debt, Total |  |  | $ 1,700,000 | $ 700,000 |  |  |  |  |  |
Debt Issuance Costs, Net, Total |  |  |  |  |  | $ 154,000 | 162,000 |  |  |
Debt Instrument, Interest Rate, Effective Percentage |  |  |  |  |  | 5.97% |  |  |  |
Amortization of Debt Issuance Costs |  |  |  |  |  | $ 7,000 | 7,000 |  |  |
Interest Payable |  |  |  |  |  | 8,000 | 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 |  |  |  |  |  |  |  |  | 25.00% |
Number of Consecutive Quarters for Interest Deferment |  |  |  |  | 20 |  |  |  |  |
Interest Expense, Subordinated Notes and Debentures |  |  |  |  |  | 440,000 | 360,000 |  |  |
Long-term Debt, Gross |  |  |  |  |  | 8,248,000 |  |  |  |
Notes Payable, Other Payables [Member] |  |  |  |  |  |  |  |  |  |
Long-term Debt, Total |  |  |  |  |  | 1,388,000 |  |  |  |
Interest Expense, Debt, Total |  |  |  |  |  | 26,000 | 29,000 |  |  |
Debt Instrument, Face Amount |  | $ 2,000,000 |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 1.75% |  |  |  |  |  |  |  |
Debt Issuance Costs, Net, Total |  |  |  |  |  |  |  |  |  |
Debt Instrument, Term |  | 9 years |  |  |  |  |  |  |  |
Long-term Debt, Gross |  |  |  |  |  | $ 1,388,000 | 1,600,000 |  |  |
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid |  | $ 234,000 |  |  |  |  |  |  |  |
London Interbank Offered Rate (LIBOR) [Member] | Subordinated Notes [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 3.325% |  |  |  |  |  |  |  |  |
London Interbank Offered Rate (LIBOR) [Member] | Junior Subordinated Debt [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  |  |  | 3.15% |  |  |  |
Advances from FHLB, Callable in Second Half of 2018 and Up to October 2020 [Member] |  |  |  |  |  |  |  |  |  |
Advances from Federal Home Loan Banks, Total |  |  |  |  |  | $ 60,000,000 |  |  |  |
Federal Home Loan Bank, Advances, Activity for Year, Average Interest Rate at Period End |  |  |  |  |  | 1.00% |  |  |  |
Correspondent Bank Agreement [Member] | Zions Bank [Member] |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  | $ 26,000,000 | 16,000,000 |  |  |
Long-term Line of Credit, Total |  |  |  |  |  | 0 | 0 |  |  |
Interest Expense, Debt, Total |  |  |  |  |  | $ 13,000 | 2,000 |  |  |
Minimum [Member] |  |  |  |  |  |  |  |  |  |
Federal Home Loan Bank, Advances, Interest Rate |  |  |  |  |  | 2.68% |  |  |  |
Minimum [Member] | Advances from FHLB, Callable in Second Half of 2018 and Up to October 2020 [Member] |  |  |  |  |  |  |  |  |  |
Federal Home Loan Bank, Advances, Fixed Interest Rate, after One Year |  |  |  |  |  | 3.47% |  |  |  |
Minimum [Member] | Advances from FHLB, Callable in Second Half of 2018 and Up to October 2020 [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |  |  |  |  |  |  |  |
Federal Home Loan Bank, Advances, Basis Spread on Floating Rate of Amounts Due After 90 Days |  |  |  |  |  | 1.00% |  |  |  |
Maximum [Member] |  |  |  |  |  |  |  |  |  |
Federal Home Loan Bank, Advances, Interest Rate |  |  |  |  |  | 3.20% |  |  |  |
Maximum [Member] | Advances from FHLB, Callable in Second Half of 2018 and Up to October 2020 [Member] |  |  |  |  |  |  |  |  |  |
Federal Home Loan Bank, Advances, Fixed Interest Rate, after One Year |  |  |  |  |  | 4.23% |  |  |  |
Maximum [Member] | Advances from FHLB, Callable in Second Half of 2018 and Up to October 2020 [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |  |  |  |  |  |  |  |
Federal Home Loan Bank, Advances, Basis Spread on Floating Rate of Amounts Due After 90 Days |  |  |  |  |  | 2.00% |  |  |  |
Federal Home Loan Bank Borrowings [Member] |  |  |  |  |  |  |  |  |  |
Long Term Debt, Additional Available Amount |  |  |  |  |  | $ 47,900,000 |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  | 2,000,000 | 2,000,000 |  |  |
Long-term Line of Credit, Total |  |  |  |  |  | 0 | 0 |  |  |
Interest Expense, Debt, Total |  |  |  |  |  | $ 1,600,000 | $ 702,000 |  |  |

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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + 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)(1) -URI http://asc.fasb.org/extlink&oid=109500613&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(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: 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=6877327&loc=d3e13212-122682 Reference 4: 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=6876686&loc=d3e534808-122878 + Details
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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=6877327&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=6876686&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=6879938&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=6877327&loc=d3e13212-122682 + 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=109500613&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=6879938&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=6876686&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=6877327&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=109223946&loc=d3e3291-108585 + 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=6877327&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=6876686&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=6879938&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=6877327&loc=d3e13212-122682 + Details
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