v3.26.1

COVER - USD ($)	12 Months Ended
COVER - USD ($)	Dec. 31, 2025	Mar. 24, 2026	Jan. 29, 2026
Cover [Abstract]
Document Type	10-K/A
Document Annual Report	true
Document Period End Date	Dec. 31, 2025
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-43077
Entity Registrant Name	Public Policy Holding Company, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	87-3557229
Entity Address, Address Line One	800 North Capitol Street NW
Entity Address, City or Town	Washington
Entity Address, State or Province	DC
Entity Address, Postal Zip Code	20002
City Area Code	202
Local Phone Number	688-0020
Title of 12(b) Security	Common Stock, $0.001 par value
Trading Symbol	PPHC
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	true
ICFR Auditor Attestation Flag	false
Document Financial Statement Error Correction [Flag]	true
Document Financial Statement Restatement Recovery Analysis [Flag]	true
Entity Shell Company	false
Entity Public Float			$ 242,553,173
Entity Common Stock, Shares Outstanding		28,928,777
Entity Central Index Key	0001903508
Amendment Flag	true
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2025
Amendment Description	This Amendment No. 1 to the Annual Report on Form 10-K is filed solely to (i) check the “Smaller Reporting Company” box on the cover page and (ii) revise the disclosed public float figure on the cover page.

Description of changes contained within amended document.

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-Name Form 10-K
-Number 249
-Section 310

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Subsection f

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Indicate 'Yes' or 'No' whether registrants (1) have filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that registrants were required to file such reports), and (2) have been subject to such filing requirements for the past 90 days. This information should be based on the registrant's current or most recent filing containing the related disclosure.

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Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.

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The aggregate market value of the voting and non-voting common equity held by non-affiliates computed by reference to the price at which the common equity was last sold, or the average bid and asked price of such common equity, as of the last business day of the registrant's most recently completed second fiscal quarter.

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The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.

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Public Policy Holding Company, Inc. 10-K/A