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Disclosure - Note 14 - Income Taxes (Details Textual) Sheet http://www.limestonebank.com/20191231/role/statement-note-14-income-taxes-details-textual Note 14 - Income Taxes (Details Textual) Details http://www.limestonebank.com/20191231/role/statement-note-14-income-taxes-tables 92 false false R93.htm 092 - Disclosure - Note 14 - Income Taxes - Income Tax Expense Benefit (Details) Sheet http://www.limestonebank.com/20191231/role/statement-note-14-income-taxes-income-tax-expense-benefit-details Note 14 - Income Taxes - Income Tax Expense Benefit (Details) Details 93 false false R94.htm 093 - Disclosure - Note 14 - Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details) Sheet http://www.limestonebank.com/20191231/role/statement-note-14-income-taxes-schedule-of-effective-income-tax-rate-reconciliation-details Note 14 - Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details) Details 94 false false R95.htm 094 - Disclosure - Note 14 - Income Taxes - Deferred Tax Assets and Liabilities (Details) Sheet http://www.limestonebank.com/20191231/role/statement-note-14-income-taxes-deferred-tax-assets-and-liabilities-details Note 14 - Income Taxes - Deferred Tax Assets and Liabilities (Details) Details 95 false false R96.htm 095 - Disclosure - Note 15 - Related Party Transactions (Details Textual) Sheet http://www.limestonebank.com/20191231/role/statement-note-15-related-party-transactions-details-textual Note 15 - Related Party Transactions (Details Textual) Details http://www.limestonebank.com/20191231/role/statement-note-15-related-party-transactions-tables 96 false false R97.htm 096 - Disclosure - Note 15 - Related Party Transactions - Loans to Related Parties (Details) Sheet http://www.limestonebank.com/20191231/role/statement-note-15-related-party-transactions-loans-to-related-parties-details Note 15 - Related Party Transactions - Loans to Related Parties (Details) Details 97 false false R98.htm 097 - Disclosure - Note 16 - Preferred Stock (Details Textual) Sheet http://www.limestonebank.com/20191231/role/statement-note-16-preferred-stock-details-textual Note 16 - Preferred Stock (Details Textual) Details http://www.limestonebank.com/20191231/role/statement-note-16-preferred-stock 98 false false R99.htm 098 - Disclosure - Note 17 - Regulatory Capital Matters (Details Textual) Sheet http://www.limestonebank.com/20191231/role/statement-note-17-regulatory-capital-matters-details-textual Note 17 - Regulatory Capital Matters (Details Textual) Details http://www.limestonebank.com/20191231/role/statement-note-17-regulatory-capital-matters-tables 99 false false R100.htm 099 - Disclosure - Note 17 - Regulatory Capital Matters - Ratios and Amounts of Common Equity, Capital, and Total Capital to Risk-adjusted Assets (Details) Sheet http://www.limestonebank.com/20191231/role/statement-note-17-regulatory-capital-matters-ratios-and-amounts-of-common-equity-capital-and-total-capital-to-riskadjusted-assets-details Note 17 - Regulatory Capital Matters - Ratios and Amounts of Common Equity, Capital, and Total Capital to Risk-adjusted Assets (Details) Details 100 false false R101.htm 100 - Disclosure - Note 18 - Off Balance Sheet Risks, Commitments, and Contingent Liabilities (Details Textual) Sheet http://www.limestonebank.com/20191231/role/statement-note-18-off-balance-sheet-risks-commitments-and-contingent-liabilities-details-textual Note 18 - Off Balance Sheet Risks, Commitments, and Contingent Liabilities (Details Textual) Details http://www.limestonebank.com/20191231/role/statement-note-18-off-balance-sheet-risks-commitments-and-contingent-liabilities-tables 101 false false R102.htm 101 - Disclosure - Note 18 - Off Balance Sheet Risks, Commitments, and Contingent Liabilities - Contractual Amounts of Financial Instruments With Off Balance Sheet Risk (Details) Sheet http://www.limestonebank.com/20191231/role/statement-note-18-off-balance-sheet-risks-commitments-and-contingent-liabilities-contractual-amounts-of-financial-instruments-with-off-balance-sheet-risk-details Note 18 - Off Balance Sheet Risks, Commitments, and Contingent Liabilities - Contractual Amounts of Financial Instruments With Off Balance Sheet Risk (Details) Details 102 false false R103.htm 102 - Disclosure - Note 19 - Fair Values (Details Textual) Sheet http://www.limestonebank.com/20191231/role/statement-note-19-fair-values-details-textual Note 19 - Fair Values (Details Textual) Details http://www.limestonebank.com/20191231/role/statement-note-19-fair-values-tables 103 false false R104.htm 103 - Disclosure - Note 19 - Fair Values - Financial Assets Measured at the Fair Value on Recurring and Non-recurring Basis (Details) Sheet http://www.limestonebank.com/20191231/role/statement-note-19-fair-values-financial-assets-measured-at-the-fair-value-on-recurring-and-nonrecurring-basis-details Note 19 - Fair Values - Financial Assets Measured at the Fair Value on Recurring and Non-recurring Basis (Details) Details 104 false false R105.htm 104 - Disclosure - Note 19 - Fair Values - Qualitative Information About Level Three Fair Value Measurements for Financial Instruments Measured at Fair Value on Non-recurring Basis (Details) Sheet http://www.limestonebank.com/20191231/role/statement-note-19-fair-values-qualitative-information-about-level-three-fair-value-measurements-for-financial-instruments-measured-at-fair-value-on-nonrecurring-basis-details Note 19 - 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Disclosure - Note 20 - Stock Plans and Stock Based Compensation - Unvested Share Activity (Details) Sheet http://www.limestonebank.com/20191231/role/statement-note-20-stock-plans-and-stock-based-compensation-unvested-share-activity-details Note 20 - Stock Plans and Stock Based Compensation - Unvested Share Activity (Details) Details 108 false false R109.htm 108 - Disclosure - Note 20 - Stock Plans and Stock Based Compensation - Unrecognized Stock Based Compensation Expense Related to Unvested Shares (Details) Sheet http://www.limestonebank.com/20191231/role/statement-note-20-stock-plans-and-stock-based-compensation-unrecognized-stock-based-compensation-expense-related-to-unvested-shares-details Note 20 - Stock Plans and Stock Based Compensation - Unrecognized Stock Based Compensation Expense Related to Unvested Shares (Details) Details 109 false false R110.htm 109 - Disclosure - Note 21 - Earnings Per Share (Details Textual) Sheet http://www.limestonebank.com/20191231/role/statement-note-21-earnings-per-share-details-textual Note 21 - 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