Summary of Significant Accounting Policies	9 Months Ended
Summary of Significant Accounting Policies	Dec. 31, 2023
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	2. Summary of Significant Accounting Policies Basis of Presentation The accompanying unaudited condensed consolidated financial statements of the Company have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. Management believes it has made all necessary adjustments (which consisted of only normal recurring items) so that the condensed consolidated financial statements are presented fairly and that estimates made in preparing the condensed consolidated financial statements are reasonable and prudent. Results of operations for the three and nine months ended December 31, 2023 are not necessarily indicative of the results that may be expected for the year ending March 31, 2024. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements included in HLI’s Annual Report on Form 10-K for the fiscal year ended March 31, 2023. Accounting for Differing Fiscal Periods The Partnerships primarily have a fiscal year end as of December 31, and the Company accounts for its investments in the Partnerships using a three-month lag due to the timing of financial information received from the investments held by the Partnerships. The Partnerships primarily invest in private equity funds, which generally require at least 90 days following the calendar year end to present audited financial statements. The Company records its share of capital contributions to and distributions from the Partnerships in investments in the Condensed Consolidated Balance Sheets during the three-month lag period. Fair Value of Financial Instruments The Company utilizes a hierarchy that prioritizes fair value measurements based on the types of inputs used for the various valuation techniques (market approach, income approach, and cost approach). The levels of the hierarchy are described below: •Level 1: Values are determined using quoted market prices for identical financial instruments in an active market. •Level 2: Values are determined using quoted prices for similar financial instruments and valuation models whose inputs are observable. •Level 3: Values are determined using pricing models that use significant inputs that are primarily unobservable, discounted cash flow methodologies or similar techniques, as well as instruments for which the determination of fair value requires significant management judgment or estimation. The carrying amount of cash and cash equivalents, fees receivable, and accounts payable approximate fair value due to the immediate or short-term maturity of these financial instruments. Recent Accounting Pronouncements In October 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2023-06 - Disclosure Improvements: Codification Amendments in Response to the SEC’s Disclosure Update and Simplification Initiative. The amendments in this ASU incorporate 14 of the 27 disclosure requirements published in SEC Release No. 33-10532 - Disclosure Update and Simplification into various topics within the Accounting Standards Codification (“ASC”). The amendments represent clarifications to, or technical corrections of, current requirements. For SEC registrants, the effective date for each amendment will be the date on which the SEC removes that related disclosure from its rules. Early adoption is prohibited. The amendments will be applied retrospectively to all prior periods presented in the financial statements. The Company is currently assessing the impact of the new requirements. In November 2023, the FASB issued ASU 2023-07, Segment Reporting (Topic 280) - Improvements to Reportable Segment Disclosures. This ASU enhances segment disclosures primarily around significant segment expenses for both interim and annual periods. The amendments in this ASU are to be applied retrospectively and are effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years after December 15, 2024. Early adoption is permitted. The Company is currently assessing the impact of the new requirements. In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures, to enhance transparency and decision usefulness of income tax disclosures. ASU 2023-09 is effective for annual periods beginning after December 15, 2024, on a prospective basis, with early adoption permitted. The Company is evaluating the impact of adopting this ASU.