Nature of Operations and Significant Accounting Policies (Policies)	3 Months Ended
Mar. 31, 2026
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying condensed consolidated financial statements for BSHI and its wholly-owned subsidiaries are prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) for interim financial information and do not contain all of the information and footnotes required by U.S. GAAP for complete financial statements. As such, the disclosures provided herein should be read in conjunction with the Company’s latest annual financial statements. In the opinion of management, the condensed consolidated financial statements reflect all adjustments, consisting of only normal recurring adjustments, necessary for the fair statement of the Company’s financial position. All intercompany transactions and balances are eliminated in consolidation. Interim results are not necessarily indicative of results of operations for the full year.
Use of Estimates	Use of Estimates The preparation of the condensed financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the condensed consolidated financial statements and accompanying notes. Changes in circumstances could cause actual results to differ materially from those estimates. Significant estimates in the Company’s condensed consolidated financial statements include, but are not limited to, reserves for losses and loss adjustment expenses, reinsurance recoverable on unpaid losses and loss adjustment expenses, fair value of investments, and income taxes. Management bases its estimates and assumptions on historical experience and other factors, including the current economic environment and on various other judgments that it believes to be reasonable under the circumstances. Management periodically reviews its estimates and assumptions and makes adjustments thereto when facts and circumstances dictate. Changes in accounting estimates and underlying assumptions are recognized prospectively in the condensed consolidated financial statements.
Recent Accounting Pronouncements	Recent Accounting Pronouncements Recently Adopted Accounting Standards The Company has not adopted any new accounting standards during the three months ended March 31, 2026. Recently Issued Accounting Standards Not Yet Adopted The Company is an emerging growth company, as defined in the Jumpstart Our Business Startups Act of 2012 (the “JOBS Act”). Under the JOBS Act, emerging growth companies can delay adopting new or revised accounting standards issued subsequent to the enactment of the JOBS Act, until such time as those standards apply to private companies. The Company is provided an option to adopt new or revised accounting guidance as an “emerging growth company” under the JOBS Act either (1) within the same periods as those otherwise applicable to public business entities, or (2) within the same time periods as private companies, including early adoption when permissible. ASU 2024-03, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses In November 2024, the FASB issued ASU 2024-03, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses. ASU 2024-03 enhances the transparency of expense information by requiring public business entities to disclose specific types of expenses included in the expense captions presented on the face of the income statement as well as disclosures about selling expenses. The amendments are effective for fiscal years beginning after December 15, 2026. The Company is currently evaluating the impact of this ASU on its financial statement disclosures. ASU 2025-06, Intangibles-Goodwill and Other-Internal Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software In September 2025, the FASB issued ASU 2025-06, “Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software”, which removes the prescriptive “project stage” model and requires capitalization once management authorizes funding and completion is probable. Entities must also assess whether significant development uncertainty exists. The amendments are effective prospectively for fiscal years beginning after December 15, 2027, with early adoption permitted. The Company is in the process of evaluating the effect that the adoption of these standards will have on its consolidated financial statements. ASU 2025-11, Interim Reporting - Narrow-Scope Improvements In December 2025, the FASB issued ASU 2025-11, Interim Reporting (Topic 270): Narrow-Scope Improvements. The amendments clarify the scope, form and content, and disclosure requirements for entities that provide interim financial statements in accordance with U.S. GAAP, and introduce a comprehensive list of required interim disclosures. The amendments are effective for interim reporting periods within annual periods beginning after December 15, 2027, with early adoption permitted. The Company is in the process of evaluating the effects that the adoption standards will have on its consolidated financial statements. ASU 2025-12, Codification Improvements In December 2025, the FASB issued ASU 2025-12, “Codification Improvements”, which includes several technical corrections, clarifications, and minor improvements to various topics in the FASB Accounting Standards Codification. The amendments are primarily editorial or clarifying in nature and are not expected to result in significant changes in current accounting practice. The amendments are effective for fiscal years beginning after December 15, 2026, with early adoption permitted. The Company is in the process of evaluating the effects that the adoption standards will have on its consolidated financial statements.disclosures and a new disclosure principle for material events occurring after the prior annual period. There are no other prospective accounting standards which, upon their effective date, would have a material impact on the Company’s condensed consolidated financial statements.
Fair Value Measurements	Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Fair value is determined based on a fair value hierarchy that prioritizes the use of observable inputs over the use of unobservable inputs and requires the use of observable inputs when available. The Company utilizes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value into three levels, as follows: •Level 1: Unadjusted quoted prices in active markets that are accessible at the measurement date for identical assets or liabilities. •Level 2: Significant other observable inputs other than Level 1 inputs, such as quoted prices in active markets for similar assets or liabilities, quoted prices in inactive markets for identical assets or liabilities, or other inputs that are directly or indirectly observable through market-corroborated inputs, such as interest rates, yield curves, prepayment speeds, default rates, or loss severities. •Level 3: Significant unobservable inputs used to measure fair value to the extent that relevant observable inputs are not available, and that reflect the Company’s best estimate of what hypothetical market participants would use to determine a transaction price for the asset or liability at the measurement date. The Company’s investments in fixed maturity securities, all of which are classified as available for sale, are carried at fair value. All of the Company’s fixed maturity securities investments were priced by independent pricing services. The prices provided by the independent pricing services are estimated based on observable market data in active markets utilizing pricing models and processes, which may include benchmark yields, reported trades, broker/dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids, offers, sector groupings, matrix pricing and reference data. Under certain circumstances, if a vendor price is unavailable, a price may be obtained from a broker. The pricing services may prioritize inputs differently on any given day for any security based on market conditions, and not all inputs are available for each security evaluation on any given day. The pricing services used by the Company have indicated that they will only produce an estimate of fair value if objectively verifiable information is available. The determination of whether markets are active or inactive is based upon the volume and level of activity for a particular asset class. The fair values of short-term investments approximate their carrying values due to their short-term maturity.

Nature of Operations and Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2026

The accompanying condensed consolidated financial statements for BSHI and its wholly-owned subsidiaries are prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) for interim financial information and do not contain all of the information and footnotes required by U.S. GAAP for complete financial statements. As such, the disclosures provided herein should be read in conjunction with the Company’s latest annual financial statements. In the opinion of management, the condensed consolidated financial statements reflect all adjustments, consisting of only normal recurring adjustments, necessary for the fair statement of the Company’s financial position. All intercompany transactions and balances are eliminated in consolidation. Interim results are not necessarily indicative of results of operations for the full year.

Use of Estimates

The preparation of the condensed financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the condensed consolidated financial statements and accompanying notes. Changes in circumstances could cause actual results to differ materially from those estimates. Significant estimates in the Company’s condensed consolidated financial statements include, but are not limited to, reserves for losses and loss adjustment expenses, reinsurance recoverable on unpaid losses and loss adjustment expenses, fair value of investments, and income taxes.

Management bases its estimates and assumptions on historical experience and other factors, including the current economic environment and on various other judgments that it believes to be reasonable under the circumstances. Management periodically reviews its estimates and assumptions and makes adjustments thereto when facts and circumstances dictate. Changes in accounting estimates and underlying assumptions are recognized prospectively in the condensed consolidated financial statements.

Recent Accounting Pronouncements

Recently Adopted Accounting Standards

The Company has not adopted any new accounting standards during the three months ended March 31, 2026.

Recently Issued Accounting Standards Not Yet Adopted

The Company is an emerging growth company, as defined in the Jumpstart Our Business Startups Act of 2012 (the “JOBS Act”). Under the JOBS Act, emerging growth companies can delay adopting new or revised accounting standards issued subsequent to the enactment of the JOBS Act, until such time as those standards apply to private companies. The Company is provided an option to adopt new or revised accounting guidance as an “emerging growth company” under the JOBS Act either (1) within the same periods as those otherwise applicable to public business entities, or (2) within the same time periods as private companies, including early adoption when permissible.

ASU 2024-03, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses

In November 2024, the FASB issued ASU 2024-03, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses. ASU 2024-03 enhances the transparency of expense information by requiring public business entities to disclose specific types of expenses included in the expense captions presented on the face of the income statement as well as disclosures about selling expenses. The amendments are effective for fiscal years beginning after December 15, 2026. The Company is currently evaluating the impact of this ASU on its financial statement disclosures.

ASU 2025-06, Intangibles-Goodwill and Other-Internal Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software

In September 2025, the FASB issued ASU 2025-06, “Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software”, which removes the prescriptive “project stage” model and requires capitalization once management authorizes funding and completion is probable. Entities must also assess whether significant development uncertainty exists. The amendments are effective prospectively for fiscal years beginning after December 15, 2027, with early adoption permitted. The Company is in the process of evaluating the effect that the adoption of these standards will have on its consolidated financial statements.

ASU 2025-11, Interim Reporting - Narrow-Scope Improvements

In December 2025, the FASB issued ASU 2025-11, Interim Reporting (Topic 270): Narrow-Scope Improvements. The amendments clarify the scope, form and content, and disclosure requirements for entities that provide interim financial statements in accordance with U.S. GAAP, and introduce a comprehensive list of required interim disclosures. The amendments are effective for interim reporting periods within annual periods beginning after December 15, 2027, with early adoption permitted. The Company is in the process of evaluating the effects that the adoption standards will have on its consolidated financial statements.

ASU 2025-12, Codification Improvements

In December 2025, the FASB issued ASU 2025-12, “Codification Improvements”, which includes several technical corrections, clarifications, and minor improvements to various topics in the FASB Accounting Standards Codification. The amendments are primarily editorial or clarifying in nature and are not expected to result in significant changes in current accounting practice. The amendments are effective for fiscal years beginning after December 15, 2026, with early adoption permitted. The Company is in the process of evaluating the effects that the adoption standards will have on its consolidated financial statements.disclosures and a new disclosure principle for material events occurring after the prior annual period.

There are no other prospective accounting standards which, upon their effective date, would have a material impact on the Company’s condensed consolidated financial statements.

Fair Value Measurements

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Fair value is determined based on a fair value hierarchy that prioritizes the use of observable inputs over the use of unobservable inputs and requires the use of observable inputs when available. The Company utilizes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value into three levels, as follows:

•Level 1: Unadjusted quoted prices in active markets that are accessible at the measurement date for identical assets or liabilities.

•Level 2: Significant other observable inputs other than Level 1 inputs, such as quoted prices in active markets for similar assets or liabilities, quoted prices in inactive markets for identical assets or liabilities, or other inputs that are directly or indirectly observable through market-corroborated inputs, such as interest rates, yield curves, prepayment speeds, default rates, or loss severities.

•Level 3: Significant unobservable inputs used to measure fair value to the extent that relevant observable inputs are not available, and that reflect the Company’s best estimate of what hypothetical market participants would use to determine a transaction price for the asset or liability at the measurement date.

The Company’s investments in fixed maturity securities, all of which are classified as available for sale, are carried at fair value. All of the Company’s fixed maturity securities investments were priced by independent pricing services. The prices provided by the independent pricing services are estimated based on observable market data in active markets utilizing pricing models and processes, which may include benchmark yields, reported trades, broker/dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids, offers, sector groupings, matrix pricing and reference data. Under certain circumstances, if a vendor price is unavailable, a price may be obtained from a broker. The pricing services may prioritize inputs differently on any given day for any security based on market conditions, and not all inputs are available for each security evaluation on any given day. The pricing services used by the Company have indicated that they will only produce an estimate of fair value if objectively verifiable information is available. The determination of whether markets are active or inactive is based upon the volume and level of activity for a particular asset class.

The fair values of short-term investments approximate their carrying values due to their short-term maturity.