3.20.1 html 451 489 1 false 85 0 false 4 false false R1.htm 000 - Document - Document And Entity Information Sheet http://www.limestonebank.com/20200331/role/statement-document-and-entity-information Document And Entity Information Cover 1 false false R2.htm 001 - Statement - Unaudited Consolidated Balance Sheets (Current Period Unaudited) Sheet http://www.limestonebank.com/20200331/role/statement-unaudited-consolidated-balance-sheets-current-period-unaudited Unaudited Consolidated Balance Sheets (Current Period Unaudited) Statements 2 false false R3.htm 002 - Statement - Unaudited Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) Sheet http://www.limestonebank.com/20200331/role/statement-unaudited-consolidated-balance-sheets-current-period-unaudited-parentheticals Unaudited Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) Statements 3 false false R4.htm 003 - Statement - Unaudited Consolidated Statements of Income Sheet http://www.limestonebank.com/20200331/role/statement-unaudited-consolidated-statements-of-income Unaudited Consolidated Statements of Income Statements 4 false false R5.htm 004 - Statement - Unaudited Consolidated Statements of Comprehensive Income (Loss) Sheet http://www.limestonebank.com/20200331/role/statement-unaudited-consolidated-statements-of-comprehensive-income-loss Unaudited Consolidated Statements of Comprehensive Income (Loss) Statements 5 false false R6.htm 005 - Statement - Unaudited Consolidated Statements of Changes in Stockholders' Equity Sheet http://www.limestonebank.com/20200331/role/statement-unaudited-consolidated-statements-of-changes-in-stockholders-equity Unaudited Consolidated Statements of Changes in Stockholders' Equity Statements 6 false false R7.htm 006 - Statement - Unaudited Consolidated Statements of Cash Flows Sheet http://www.limestonebank.com/20200331/role/statement-unaudited-consolidated-statements-of-cash-flows- Unaudited Consolidated Statements of Cash Flows Statements 7 false false R8.htm 007 - Disclosure - Note 1 - Basis of Presentation and Summary of Significant Accounting Policies Sheet http://www.limestonebank.com/20200331/role/statement-note-1-basis-of-presentation-and-summary-of-significant-accounting-policies Note 1 - Basis of Presentation and Summary of Significant Accounting Policies Notes 8 false false R9.htm 008 - Disclosure - Note 2 - Securities Sheet http://www.limestonebank.com/20200331/role/statement-note-2-securities Note 2 - Securities Notes 9 false false R10.htm 009 - Disclosure - Note 3 - Loans Sheet http://www.limestonebank.com/20200331/role/statement-note-3-loans Note 3 - Loans Notes 10 false false R11.htm 010 - Disclosure - Note 4 - Leases Sheet http://www.limestonebank.com/20200331/role/statement-note-4-leases Note 4 - Leases Notes 11 false false R12.htm 011 - Disclosure - Note 5 - Other Real Estate Owned Sheet http://www.limestonebank.com/20200331/role/statement-note-5-other-real-estate-owned Note 5 - Other Real Estate Owned Notes 12 false false R13.htm 012 - Disclosure - Note 6 - Goodwill and Intangible Assets Sheet http://www.limestonebank.com/20200331/role/statement-note-6-goodwill-and-intangible-assets- Note 6 - Goodwill and Intangible Assets Notes 13 false false R14.htm 013 - Disclosure - Note 7 - Deposits Sheet http://www.limestonebank.com/20200331/role/statement-note-7-deposits Note 7 - Deposits Notes 14 false false R15.htm 014 - Disclosure - Note 8 - Advances from the Federal Home Loan Bank Sheet http://www.limestonebank.com/20200331/role/statement-note-8-advances-from-the-federal-home-loan-bank Note 8 - Advances from the Federal Home Loan Bank Notes 15 false false R16.htm 015 - Disclosure - Note 9 - Borrowings Sheet http://www.limestonebank.com/20200331/role/statement-note-9-borrowings Note 9 - Borrowings Notes 16 false false R17.htm 016 - Disclosure - Note 10 - Fair Values Measurement Sheet http://www.limestonebank.com/20200331/role/statement-note-10-fair-values-measurement Note 10 - Fair Values Measurement Notes 17 false false R18.htm 017 - Disclosure - Note 11 - Income Taxes Sheet http://www.limestonebank.com/20200331/role/statement-note-11-income-taxes Note 11 - Income Taxes Notes 18 false false R19.htm 018 - Disclosure - Note 12 - Stock Plans and Stock Based Compensation Sheet http://www.limestonebank.com/20200331/role/statement-note-12-stock-plans-and-stock-based-compensation Note 12 - Stock Plans and Stock Based Compensation Notes 19 false false R20.htm 019 - Disclosure - Note 13 - Earnings per Share Sheet http://www.limestonebank.com/20200331/role/statement-note-13-earnings-per-share Note 13 - Earnings per Share Notes 20 false false R21.htm 020 - Disclosure - Note 14 - Regulatory Capital Matters Sheet http://www.limestonebank.com/20200331/role/statement-note-14-regulatory-capital-matters Note 14 - Regulatory Capital Matters Notes 21 false false R22.htm 021 - Disclosure - Note 15 - Off Balance Sheet Risks, Commitments, and Contingent Liabilities Sheet http://www.limestonebank.com/20200331/role/statement-note-15-off-balance-sheet-risks-commitments-and-contingent-liabilities- Note 15 - Off Balance Sheet Risks, Commitments, and Contingent Liabilities Notes 22 false false R23.htm 022 - Disclosure - Note 16 - Revenue from Contracts With Customers Sheet http://www.limestonebank.com/20200331/role/statement-note-16-revenue-from-contracts-with-customers Note 16 - Revenue from Contracts With Customers Notes 23 false false R24.htm 023 - Disclosure - Significant Accounting Policies (Policies) Sheet http://www.limestonebank.com/20200331/role/statement-significant-accounting-policies-policies Significant Accounting Policies (Policies) Policies http://www.limestonebank.com/20200331/role/statement-note-1-basis-of-presentation-and-summary-of-significant-accounting-policies 24 false false R25.htm 024 - Disclosure - Note 2 - Securities (Tables) Sheet http://www.limestonebank.com/20200331/role/statement-note-2-securities-tables Note 2 - Securities (Tables) Tables http://www.limestonebank.com/20200331/role/statement-note-2-securities 25 false false R26.htm 025 - Disclosure - Note 3 - Loans (Tables) Sheet http://www.limestonebank.com/20200331/role/statement-note-3-loans-tables Note 3 - Loans (Tables) Tables http://www.limestonebank.com/20200331/role/statement-note-3-loans 26 false false R27.htm 026 - Disclosure - Note 4 - Leases (Tables) Sheet http://www.limestonebank.com/20200331/role/statement-note-4-leases-tables Note 4 - Leases (Tables) Tables http://www.limestonebank.com/20200331/role/statement-note-4-leases 27 false false R28.htm 027 - Disclosure - Note 5 - Other Real Estate Owned (Tables) Sheet http://www.limestonebank.com/20200331/role/statement-note-5-other-real-estate-owned-tables Note 5 - Other Real Estate Owned (Tables) Tables http://www.limestonebank.com/20200331/role/statement-note-5-other-real-estate-owned 28 false false R29.htm 028 - Disclosure - Note 6 - Goodwill and Intangible Assets (Tables) Sheet http://www.limestonebank.com/20200331/role/statement-note-6-goodwill-and-intangible-assets-tables Note 6 - Goodwill and Intangible Assets (Tables) Tables http://www.limestonebank.com/20200331/role/statement-note-6-goodwill-and-intangible-assets- 29 false false R30.htm 029 - Disclosure - Note 7 - Deposits (Tables) Sheet http://www.limestonebank.com/20200331/role/statement-note-7-deposits-tables Note 7 - Deposits (Tables) Tables http://www.limestonebank.com/20200331/role/statement-note-7-deposits 30 false false R31.htm 030 - Disclosure - Note 8 - Advances from the Federal Home Loan Bank (Tables) Sheet http://www.limestonebank.com/20200331/role/statement-note-8-advances-from-the-federal-home-loan-bank-tables Note 8 - Advances from the Federal Home Loan Bank (Tables) Tables http://www.limestonebank.com/20200331/role/statement-note-8-advances-from-the-federal-home-loan-bank 31 false false R32.htm 031 - Disclosure - Note 10 - Fair Values Measurement (Tables) Sheet http://www.limestonebank.com/20200331/role/statement-note-10-fair-values-measurement-tables Note 10 - Fair Values Measurement (Tables) Tables http://www.limestonebank.com/20200331/role/statement-note-10-fair-values-measurement 32 false false R33.htm 032 - Disclosure - Note 11 - Income Taxes (Tables) Sheet http://www.limestonebank.com/20200331/role/statement-note-11-income-taxes-tables Note 11 - Income Taxes (Tables) Tables http://www.limestonebank.com/20200331/role/statement-note-11-income-taxes 33 false false R34.htm 033 - Disclosure - Note 12 - Stock Plans and Stock Based Compensation (Tables) Sheet http://www.limestonebank.com/20200331/role/statement-note-12-stock-plans-and-stock-based-compensation-tables Note 12 - Stock Plans and Stock Based Compensation (Tables) Tables http://www.limestonebank.com/20200331/role/statement-note-12-stock-plans-and-stock-based-compensation 34 false false R35.htm 034 - Disclosure - Note 13 - Earnings per Share (Tables) Sheet http://www.limestonebank.com/20200331/role/statement-note-13-earnings-per-share-tables Note 13 - Earnings per Share (Tables) Tables http://www.limestonebank.com/20200331/role/statement-note-13-earnings-per-share 35 false false R36.htm 035 - Disclosure - Note 14 - Regulatory Capital Matters (Tables) Sheet http://www.limestonebank.com/20200331/role/statement-note-14-regulatory-capital-matters-tables Note 14 - Regulatory Capital Matters (Tables) Tables http://www.limestonebank.com/20200331/role/statement-note-14-regulatory-capital-matters 36 false false R37.htm 036 - Disclosure - Note 15 - Off Balance Sheet Risks, Commitments, and Contingent Liabilities (Tables) Sheet http://www.limestonebank.com/20200331/role/statement-note-15-off-balance-sheet-risks-commitments-and-contingent-liabilities-tables Note 15 - Off Balance Sheet Risks, Commitments, and Contingent Liabilities (Tables) Tables http://www.limestonebank.com/20200331/role/statement-note-15-off-balance-sheet-risks-commitments-and-contingent-liabilities- 37 false false R38.htm 037 - Disclosure - Note 1 - Basis of Presentation and Summary of Significant Accounting Policies (Details Textual) Sheet http://www.limestonebank.com/20200331/role/statement-note-1-basis-of-presentation-and-summary-of-significant-accounting-policies-details-textual Note 1 - Basis of Presentation and Summary of Significant Accounting Policies (Details Textual) Details 38 false false R39.htm 038 - Disclosure - Note 2 - Securities (Details Textual) Sheet http://www.limestonebank.com/20200331/role/statement-note-2-securities-details-textual Note 2 - Securities (Details Textual) Details http://www.limestonebank.com/20200331/role/statement-note-2-securities-tables 39 false false R40.htm 039 - Disclosure - Note 2 - Securities - Amortized Cost, Gross Unrealized Gains or Losses, and Fair Value of Investment Securities (Details) Sheet http://www.limestonebank.com/20200331/role/statement-note-2-securities-amortized-cost-gross-unrealized-gains-or-losses-and-fair-value-of-investment-securities-details Note 2 - Securities - Amortized Cost, Gross Unrealized Gains or Losses, and Fair Value of Investment Securities (Details) Details 40 false false R41.htm 040 - Disclosure - Note 2 - Securities - Sales and Calls of Securities (Details) Sheet http://www.limestonebank.com/20200331/role/statement-note-2-securities-sales-and-calls-of-securities-details Note 2 - Securities - Sales and Calls of Securities (Details) Details 41 false false R42.htm 041 - Disclosure - Note 2 - Securities - Amortized Cost and Fair Value of Debt Investment Securities Portfolio by Contractual Maturity (Details) Sheet http://www.limestonebank.com/20200331/role/statement-note-2-securities-amortized-cost-and-fair-value-of-debt-investment-securities-portfolio-by-contractual-maturity-details Note 2 - Securities - Amortized Cost and Fair Value of Debt Investment Securities Portfolio by Contractual Maturity (Details) Details 42 false false R43.htm 042 - Disclosure - Note 2 - Securities - Securities With Unrealized Losses (Details) Sheet http://www.limestonebank.com/20200331/role/statement-note-2-securities-securities-with-unrealized-losses-details Note 2 - Securities - Securities With Unrealized Losses (Details) Details 43 false false R44.htm 043 - Disclosure - Note 3 - Loans (Details Textual) Sheet http://www.limestonebank.com/20200331/role/statement-note-3-loans-details-textual Note 3 - Loans (Details Textual) Details http://www.limestonebank.com/20200331/role/statement-note-3-loans-tables 44 false false R45.htm 044 - Disclosure - Note 3 - Loans - Loans (Details) Sheet http://www.limestonebank.com/20200331/role/statement-note-3-loans-loans-details Note 3 - Loans - Loans (Details) Details 45 false false R46.htm 045 - Disclosure - Note 3 - Loans - Activity in Allowance for Loan Losses by Portfolio Segment (Details) Sheet http://www.limestonebank.com/20200331/role/statement-note-3-loans-activity-in-allowance-for-loan-losses-by-portfolio-segment-details Note 3 - Loans - Activity in Allowance for Loan Losses by Portfolio Segment (Details) Details 46 false false R47.htm 046 - Disclosure - Note 3 - Loans - Balance in Allowance for Loan Losses and Recorded Investment in Loans by Portfolio Segment and Bases on Impairment Method (Details) Sheet http://www.limestonebank.com/20200331/role/statement-note-3-loans-balance-in-allowance-for-loan-losses-and-recorded-investment-in-loans-by-portfolio-segment-and-bases-on-impairment-method-details Note 3 - Loans - Balance in Allowance for Loan Losses and Recorded Investment in Loans by Portfolio Segment and Bases on Impairment Method (Details) Details 47 false false R48.htm 047 - Disclosure - Note 3 - Loans - Loans Individually Evaluated for Impairment by Class of Loans (Details) Sheet http://www.limestonebank.com/20200331/role/statement-note-3-loans-loans-individually-evaluated-for-impairment-by-class-of-loans-details Note 3 - Loans - Loans Individually Evaluated for Impairment by Class of Loans (Details) Details 48 false false R49.htm 048 - Disclosure - Note 3 - Loans - Types of Troubled Debt Restructuring Loan Modification by Portfolio Segment (Details) Sheet http://www.limestonebank.com/20200331/role/statement-note-3-loans-types-of-troubled-debt-restructuring-loan-modification-by-portfolio-segment-details Note 3 - Loans - Types of Troubled Debt Restructuring Loan Modification by Portfolio Segment (Details) Details 49 false false R50.htm 049 - Disclosure - Note 3 - Loans - Recorded Investment in Nonaccrual and Loans Past Due 90 Days and Still on Accrual by Class of Loan (Details) Sheet http://www.limestonebank.com/20200331/role/statement-note-3-loans-recorded-investment-in-nonaccrual-and-loans-past-due-90-days-and-still-on-accrual-by-class-of-loan-details Note 3 - Loans - Recorded Investment in Nonaccrual and Loans Past Due 90 Days and Still on Accrual by Class of Loan (Details) Details 50 false false R51.htm 050 - Disclosure - Note 3 - Loans - Aging of Recorded Investment in Past Due Loans (Details) Sheet http://www.limestonebank.com/20200331/role/statement-note-3-loans-aging-of-recorded-investment-in-past-due-loans-details Note 3 - Loans - Aging of Recorded Investment in Past Due Loans (Details) Details 51 false false R52.htm 051 - Disclosure - Note 3 - Loans - Risk Category of Loans by Class of Loans (Details) Sheet http://www.limestonebank.com/20200331/role/statement-note-3-loans-risk-category-of-loans-by-class-of-loans-details Note 3 - Loans - Risk Category of Loans by Class of Loans (Details) Details 52 false false R53.htm 052 - Disclosure - Note 4 - Leases (Details Textual) Sheet http://www.limestonebank.com/20200331/role/statement-note-4-leases-details-textual Note 4 - Leases (Details Textual) Details http://www.limestonebank.com/20200331/role/statement-note-4-leases-tables 53 false false R54.htm 053 - Disclosure - Note 4 - Leases - Future Minimum Lease Payments (Details) Sheet http://www.limestonebank.com/20200331/role/statement-note-4-leases-future-minimum-lease-payments-details Note 4 - Leases - Future Minimum Lease Payments (Details) Details 54 false false R55.htm 054 - Disclosure - Note 5 - Other Real Estate Owned (Details Textual) Sheet http://www.limestonebank.com/20200331/role/statement-note-5-other-real-estate-owned-details-textual Note 5 - Other Real Estate Owned (Details Textual) Details http://www.limestonebank.com/20200331/role/statement-note-5-other-real-estate-owned-tables 55 false false R56.htm 055 - Disclosure - Note 5 - Other Real Estate Owned - Major Categories of OREO (Details) Sheet http://www.limestonebank.com/20200331/role/statement-note-5-other-real-estate-owned-major-categories-of-oreo-details Note 5 - Other Real Estate Owned - Major Categories of OREO (Details) Details 56 false false R57.htm 056 - Disclosure - Note 5 - Other Real Estate Owned - Activity Relating to Other Real Estate Owned (Details) Sheet http://www.limestonebank.com/20200331/role/statement-note-5-other-real-estate-owned-activity-relating-to-other-real-estate-owned-details Note 5 - Other Real Estate Owned - Activity Relating to Other Real Estate Owned (Details) Details 57 false false R58.htm 057 - Disclosure - Note 5 - Other Real Estate Owned - Expenses Related to Other Real Estate Owned (Details) Sheet http://www.limestonebank.com/20200331/role/statement-note-5-other-real-estate-owned-expenses-related-to-other-real-estate-owned-details Note 5 - Other Real Estate Owned - Expenses Related to Other Real Estate Owned (Details) Details 58 false false R59.htm 058 - Disclosure - Note 6 - Goodwill and Intangible Assets (Details Textual) Sheet http://www.limestonebank.com/20200331/role/statement-note-6-goodwill-and-intangible-assets-details-textual Note 6 - Goodwill and Intangible Assets (Details Textual) Details http://www.limestonebank.com/20200331/role/statement-note-6-goodwill-and-intangible-assets-tables 59 false false R60.htm 059 - Disclosure - Note 6 - Goodwill and Intangible Assets - Schedule of Goodwill and Intangible Assets (Details) Sheet http://www.limestonebank.com/20200331/role/statement-note-6-goodwill-and-intangible-assets-schedule-of-goodwill-and-intangible-assets-details Note 6 - Goodwill and Intangible Assets - Schedule of Goodwill and Intangible Assets (Details) Details 60 false false R61.htm 060 - Disclosure - Note 6 - Goodwill and Intangible Assets - Expected Amortization Expense (Details) Sheet http://www.limestonebank.com/20200331/role/statement-note-6-goodwill-and-intangible-assets-expected-amortization-expense-details Note 6 - Goodwill and Intangible Assets - Expected Amortization Expense (Details) Details 61 false false R62.htm 061 - Disclosure - Note 7 - Deposits (Details Textual) Sheet http://www.limestonebank.com/20200331/role/statement-note-7-deposits-details-textual Note 7 - Deposits (Details Textual) Details http://www.limestonebank.com/20200331/role/statement-note-7-deposits-tables 62 false false R63.htm 062 - Disclosure - Note 7 - Deposits - Deposit Balances by Category (Details) Sheet http://www.limestonebank.com/20200331/role/statement-note-7-deposits-deposit-balances-by-category-details Note 7 - Deposits - Deposit Balances by Category (Details) Details 63 false false R64.htm 063 - Disclosure - Note 7 - Deposits - Maturities of Time Deposits (Details) Sheet http://www.limestonebank.com/20200331/role/statement-note-7-deposits-maturities-of-time-deposits-details Note 7 - Deposits - Maturities of Time Deposits (Details) Details 64 false false R65.htm 064 - Disclosure - Note 8 - Advances from the Federal Home Loan Bank (Details Textual) Sheet http://www.limestonebank.com/20200331/role/statement-note-8-advances-from-the-federal-home-loan-bank-details-textual Note 8 - Advances from the Federal Home Loan Bank (Details Textual) Details http://www.limestonebank.com/20200331/role/statement-note-8-advances-from-the-federal-home-loan-bank-tables 65 false false R66.htm 065 - Disclosure - Note 8 - Advances from the Federal Home Loan Bank - Advances From the Federal Home Loan Bank (Details) Sheet http://www.limestonebank.com/20200331/role/statement-note-8-advances-from-the-federal-home-loan-bank-advances-from-the-federal-home-loan-bank-details Note 8 - Advances from the Federal Home Loan Bank - Advances From the Federal Home Loan Bank (Details) Details 66 false false R67.htm 066 - Disclosure - Note 8 - Advances from the Federal Home Loan Bank - Advances From the Federal Home Loan Bank (Details) (Parentheticals) Sheet http://www.limestonebank.com/20200331/role/statement-note-8-advances-from-the-federal-home-loan-bank-advances-from-the-federal-home-loan-bank-details-parentheticals Note 8 - Advances from the Federal Home Loan Bank - Advances From the Federal Home Loan Bank (Details) (Parentheticals) Details 67 false false R68.htm 067 - Disclosure - Note 8 - Advances from the Federal Home Loan Bank - Principal Payments on Advances From the Federal Home Loan Bank (Details) Sheet http://www.limestonebank.com/20200331/role/statement-note-8-advances-from-the-federal-home-loan-bank-principal-payments-on-advances-from-the-federal-home-loan-bank-details Note 8 - Advances from the Federal Home Loan Bank - Principal Payments on Advances From the Federal Home Loan Bank (Details) Details 68 false false R69.htm 068 - Disclosure - Note 9 - Borrowings (Details Textual) Sheet http://www.limestonebank.com/20200331/role/statement-note-9-borrowings-details-textual Note 9 - Borrowings (Details Textual) Details http://www.limestonebank.com/20200331/role/statement-note-9-borrowings 69 false false R70.htm 069 - Disclosure - Note 10 - Fair Values Measurement (Details Textual) Sheet http://www.limestonebank.com/20200331/role/statement-note-10-fair-values-measurement-details-textual Note 10 - Fair Values Measurement (Details Textual) Details http://www.limestonebank.com/20200331/role/statement-note-10-fair-values-measurement-tables 70 false false R71.htm 070 - Disclosure - Note 10 - Fair Values Measurement - Financial Assets Measured at the Fair Value on Recurring and Non-recurring Basis (Details) Sheet http://www.limestonebank.com/20200331/role/statement-note-10-fair-values-measurement-financial-assets-measured-at-the-fair-value-on-recurring-and-nonrecurring-basis-details Note 10 - Fair Values Measurement - Financial Assets Measured at the Fair Value on Recurring and Non-recurring Basis (Details) Details 71 false false R72.htm 071 - Disclosure - Note 10 - Fair Values Measurement - Carrying Amount and Estimated Fair Values of Financial Instruments (Details) Sheet http://www.limestonebank.com/20200331/role/statement-note-10-fair-values-measurement-carrying-amount-and-estimated-fair-values-of-financial-instruments-details Note 10 - Fair Values Measurement - Carrying Amount and Estimated Fair Values of Financial Instruments (Details) Details 72 false false R73.htm 072 - Disclosure - Note 11 - Income Taxes (Details Textual) Sheet http://www.limestonebank.com/20200331/role/statement-note-11-income-taxes-details-textual Note 11 - Income Taxes (Details Textual) Details http://www.limestonebank.com/20200331/role/statement-note-11-income-taxes-tables 73 false false R74.htm 073 - Disclosure - Note 11 - Income Taxes - Deferred Tax Assets and Liabilities (Details) Sheet http://www.limestonebank.com/20200331/role/statement-note-11-income-taxes-deferred-tax-assets-and-liabilities-details Note 11 - Income Taxes - Deferred Tax Assets and Liabilities (Details) Details 74 false false R75.htm 074 - Disclosure - Note 12 - Stock Plans and Stock Based Compensation (Details Textual) Sheet http://www.limestonebank.com/20200331/role/statement-note-12-stock-plans-and-stock-based-compensation-details-textual Note 12 - Stock Plans and Stock Based Compensation (Details Textual) Details http://www.limestonebank.com/20200331/role/statement-note-12-stock-plans-and-stock-based-compensation-tables 75 false false R76.htm 075 - Disclosure - Note 12 - Stock Plans and Stock Based Compensation - Unvested Share Activity (Details) Sheet http://www.limestonebank.com/20200331/role/statement-note-12-stock-plans-and-stock-based-compensation-unvested-share-activity-details Note 12 - Stock Plans and Stock Based Compensation - Unvested Share Activity (Details) Details 76 false false R77.htm 076 - Disclosure - Note 12 - Stock Plans and Stock Based Compensation - Unrecognized Stock Based Compensation Expense Related to Unvested Shares (Details) Sheet http://www.limestonebank.com/20200331/role/statement-note-12-stock-plans-and-stock-based-compensation-unrecognized-stock-based-compensation-expense-related-to-unvested-shares-details Note 12 - Stock Plans and Stock Based Compensation - Unrecognized Stock Based Compensation Expense Related to Unvested Shares (Details) Details 77 false false R78.htm 077 - Disclosure - Note 13 - Earnings per Share (Details Textual) Sheet http://www.limestonebank.com/20200331/role/statement-note-13-earnings-per-share-details-textual Note 13 - Earnings per Share (Details Textual) Details http://www.limestonebank.com/20200331/role/statement-note-13-earnings-per-share-tables 78 false false R79.htm 078 - Disclosure - Note 13 - Earnings per Share - Basic and Diluted Loss Per Share (Details) Sheet http://www.limestonebank.com/20200331/role/statement-note-13-earnings-per-share-basic-and-diluted-loss-per-share-details Note 13 - Earnings per Share - Basic and Diluted Loss Per Share (Details) Details 79 false false R80.htm 079 - Disclosure - Note 14 - Regulatory Capital Matters (Details Textual) Sheet http://www.limestonebank.com/20200331/role/statement-note-14-regulatory-capital-matters-details-textual Note 14 - Regulatory Capital Matters (Details Textual) Details http://www.limestonebank.com/20200331/role/statement-note-14-regulatory-capital-matters-tables 80 false false R81.htm 080 - Disclosure - Note 14 - Regulatory Capital Matters - Ratios and Amounts of Common Equity, Capital, and Total Capital to Risk-adjusted Assets (Details) Sheet http://www.limestonebank.com/20200331/role/statement-note-14-regulatory-capital-matters-ratios-and-amounts-of-common-equity-capital-and-total-capital-to-riskadjusted-assets-details Note 14 - Regulatory Capital Matters - Ratios and Amounts of Common Equity, Capital, and Total Capital to Risk-adjusted Assets (Details) Details 81 false false R82.htm 081 - Disclosure - Note 15 - Off Balance Sheet Risks, Commitments, and Contingent Liabilities (Details Textual) Sheet http://www.limestonebank.com/20200331/role/statement-note-15-off-balance-sheet-risks-commitments-and-contingent-liabilities-details-textual Note 15 - Off Balance Sheet Risks, Commitments, and Contingent Liabilities (Details Textual) Details http://www.limestonebank.com/20200331/role/statement-note-15-off-balance-sheet-risks-commitments-and-contingent-liabilities-tables 82 false false R83.htm 082 - Disclosure - Note 15 - Off Balance Sheet Risks, Commitments, and Contingent Liabilities - Contractual Amounts of Financial Instruments With Off Balance Sheet Risk (Details) Sheet http://www.limestonebank.com/20200331/role/statement-note-15-off-balance-sheet-risks-commitments-and-contingent-liabilities-contractual-amounts-of-financial-instruments-with-off-balance-sheet-risk-details Note 15 - Off Balance Sheet Risks, Commitments, and Contingent Liabilities - Contractual Amounts of Financial Instruments With Off Balance Sheet Risk (Details) Details 83 false false R84.htm 083 - Disclosure - Note 16 - Revenue from Contracts With Customers (Details Textual) Sheet http://www.limestonebank.com/20200331/role/statement-note-16-revenue-from-contracts-with-customers-details-textual Note 16 - Revenue from Contracts With Customers (Details Textual) Details http://www.limestonebank.com/20200331/role/statement-note-16-revenue-from-contracts-with-customers 84 false false All Reports Book All Reports lmst-20200331.xml lmst-20200331.xsd lmst-20200331_cal.xml lmst-20200331_def.xml lmst-20200331_lab.xml lmst-20200331_pre.xml http://fasb.org/us-gaap/2020-01-31 http://fasb.org/srt/2020-01-31 http://xbrl.sec.gov/dei/2019-01-31 true true