2. Accounting Policies	3 Months Ended
Mar. 31, 2019
Accounting Policies [Abstract]
2. Accounting Policies	Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from these estimates and assumptions, which include the reserves for losses and loss adjustment expenses and are subject to estimation errors due to the inherent uncertainty in projecting ultimate claim amounts that will be reported and settled over a period of many years. In addition, estimates and assumptions associated with receivables under reinsurance contracts related to contingent ceding commission revenue require judgments by management. On an on-going basis, management reevaluates its assumptions and the methods for calculating these estimates. Actual results may differ significantly from the estimates and assumptions used in preparing the consolidated financial statements. Principles of Consolidation The condensed consolidated financial statements consist of Kingstone and its wholly owned subsidiaries, as well as KICO and its wholly owned subsidiaries, CMIC Properties, Inc. (“Properties”) and 15 Joys Lane, LLC (“15 Joys Lane”), which together own the land and building from which KICO operates. All significant inter-company account balances and transactions have been eliminated in consolidation. Accounting Changes In August 2018, the SEC adopted the final rule under SEC Release No. 33-10532, “Disclosure Update and Simplification,” amending certain disclosure requirements that were redundant, duplicative, overlapping, outdated or superseded. In addition, the amendments expanded the disclosure requirements on the analysis of stockholders' equity for interim financial statements. Under the amendments, an analysis of changes in each caption of stockholders' equity presented in the balance sheet must be provided in a note or separate statement. The analysis should present a reconciliation of the beginning balance to the ending balance of each period for which a statement of comprehensive income is required to be filed. This final rule was effective on November 5, 2018. The Company adopted the provisions of this Release effective January 1, 2019, and included the required presentation of changes in stockholders’ equity for the three months ended March 31, 2019 and 2018. In February 2016, the FASB issued ASU 2016-02 – Leases (Topic 842) (“ASU 2016-02”). Under this ASU, the Company recognized a right-of-use-asset and corresponding liability on the balance sheet for all leases, except for leases covering a period of fewer than 12 months. The liability has been measured at the present value of the future minimum lease payments taking into account renewal options if applicable plus initial incremental direct costs such as commissions. The minimum payments are discounted using the Company’s incremental borrowing rate. The Company adopted ASU 2016-02 effective January 1, 2019 using the cumulative effect adjustment transition method, which applies the provision of the standard at the effective date without adjusting the comparative periods presented. The adoption of the updated guidance resulted in the Company recognizing a right-of-use asset of $855,000 as part of other assets and a lease liability of $855,000 as part of accounts payable, accrued expenses and other liabilities in the condensed consolidated balance sheet. The right-of use-asset is amortized as rent expense on a straight line basis. The adoption of this ASU did not have a material effect on the Company's results of operations or liquidity. Accounting Pronouncements In June 2016, FASB issued ASU 2016-13 - Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (“ASU 2016-13”). The revised accounting guidance requires the measurement of all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts and requires enhanced disclosures related to the significant estimates and judgments used in estimating credit losses, as well as the credit quality and underwriting standards of an organization’s portfolio. In addition, ASU 2016-13 amends the accounting for credit losses of available-for-sale debt securities and purchased financial assets with credit deterioration. ASU 2016-13 will be effective on January 1, 2020. The Company is currently evaluating the effect the updated guidance will have on its consolidated financial statements. The Company has determined that all other recently issued accounting pronouncements will not have a material impact on its consolidated financial position, results of operations and cash flows, or do not apply to its operations.

2. Accounting Policies

3 Months Ended

Mar. 31, 2019

Use of Estimates

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from these estimates and assumptions, which include the reserves for losses and loss adjustment expenses and are subject to estimation errors due to the inherent uncertainty in projecting ultimate claim amounts that will be reported and settled over a period of many years. In addition, estimates and assumptions associated with receivables under reinsurance contracts related to contingent ceding commission revenue require judgments by management. On an on-going basis, management reevaluates its assumptions and the methods for calculating these estimates. Actual results may differ significantly from the estimates and assumptions used in preparing the consolidated financial statements.

Principles of Consolidation

The condensed consolidated financial statements consist of Kingstone and its wholly owned subsidiaries, as well as KICO and its wholly owned subsidiaries, CMIC Properties, Inc. (“Properties”) and 15 Joys Lane, LLC (“15 Joys Lane”), which together own the land and building from which KICO operates. All significant inter-company account balances and transactions have been eliminated in consolidation.

Accounting Changes

In August 2018, the SEC adopted the final rule under SEC Release No. 33-10532, “Disclosure Update and Simplification,” amending certain disclosure requirements that were redundant, duplicative, overlapping, outdated or superseded. In addition, the amendments expanded the disclosure requirements on the analysis of stockholders' equity for interim financial statements. Under the amendments, an analysis of changes in each caption of stockholders' equity presented in the balance sheet must be provided in a note or separate statement. The analysis should present a reconciliation of the beginning balance to the ending balance of each period for which a statement of comprehensive income is required to be filed. This final rule was effective on November 5, 2018. The Company adopted the provisions of this Release effective January 1, 2019, and included the required presentation of changes in stockholders’ equity for the three months ended March 31, 2019 and 2018.

In February 2016, the FASB issued ASU 2016-02 – Leases (Topic 842) (“ASU 2016-02”). Under this ASU, the Company recognized a right-of-use-asset and corresponding liability on the balance sheet for all leases, except for leases covering a period of fewer than 12 months. The liability has been measured at the present value of the future minimum lease payments taking into account renewal options if applicable plus initial incremental direct costs such as commissions. The minimum payments are discounted using the Company’s incremental borrowing rate. The Company adopted ASU 2016-02 effective January 1, 2019 using the cumulative effect adjustment transition method, which applies the provision of the standard at the effective date without adjusting the comparative periods presented. The adoption of the updated guidance resulted in the Company recognizing a right-of-use asset of $855,000 as part of other assets and a lease liability of $855,000 as part of accounts payable, accrued expenses and other liabilities in the condensed consolidated balance sheet. The right-of use-asset is amortized as rent expense on a straight line basis. The adoption of this ASU did not have a material effect on the Company's results of operations or liquidity.

Accounting Pronouncements

In June 2016, FASB issued ASU 2016-13 - Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (“ASU 2016-13”). The revised accounting guidance requires the measurement of all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts and requires enhanced disclosures related to the significant estimates and judgments used in estimating credit losses, as well as the credit quality and underwriting standards of an organization’s portfolio. In addition, ASU 2016-13 amends the accounting for credit losses of available-for-sale debt securities and purchased financial assets with credit deterioration. ASU 2016-13 will be effective on January 1, 2020. The Company is currently evaluating the effect the updated guidance will have on its consolidated financial statements.

The Company has determined that all other recently issued accounting pronouncements will not have a material impact on its consolidated financial position, results of operations and cash flows, or do not apply to its operations.