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Cover - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Feb. 26, 2026
Jun. 30, 2025
Document Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Dec. 31, 2025    
Entity File Number 001-42477    
Entity Registrant Name Flowco Holdings Inc.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 99-4382473    
Entity Address, Address Line One 1300 Post Oak Blvd.    
Entity Address, Address Line Two Suite 450    
Entity Address, City or Town Houston    
Entity Address, State or Province TX    
Entity Address, Postal Zip Code 77056    
City Area Code 713    
Local Phone Number 997-4877    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company true    
Entity Ex Transition Period false    
Entity Shell Company false    
Entity Central Index Key 0002035149    
Document Fiscal Year Focus 2025    
Document Fiscal Period Focus FY    
Current Fiscal Year End Date --12-31    
Amendment Flag false    
Entity Public Float     $ 362.9
Entity Voluntary Filers No    
Entity Well-known Seasoned Issuer No    
Document Financial Statement Error Correction [Flag] false    
ICFR Auditor Attestation Flag false    
Documents Incorporated by Reference [Text Block]

DOCUMENTS INCORPORATED BY REFERENCE

Part III of this Annual Report on Form 10-K incorporates certain information by reference from the registrant’s definitive proxy statement for the 2026 annual meeting of stockholders to be filed no later than 120 days after the end of the registrant’s fiscal year.

    
Auditor Opinion [Text Block]

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of Flowco Holdings Inc. and its subsidiaries (the "Company") as of December 31, 2025 and 2024, and the related consolidated statements of operations, of redeemable non-controlling interests and stockholders'/members' equity and of cash flows for each of the three years in the period ended December 31, 2025, including the related notes (collectively referred to as the "consolidated financial statements"). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2025 and 2024, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2025 in conformity with accounting principles generally accepted in the United States of America.

    
Auditor Name PricewaterhouseCoopers LLP    
Auditor Firm ID 238    
Auditor Location Houston, Texas    
Class A Common Stock      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   29,647,189  
Class B Common Stock      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   60,015,566  
New York Stock Exchange      
Document Information [Line Items]      
Title of 12(b) Security Class A common stock, par value $0.0001 per share    
Trading Symbol FLOC    
Security Exchange Name NYSE    
NYSE Texas, Inc.      
Document Information [Line Items]      
Title of 12(b) Security Class A common stock, par value $0.0001 per share    
Trading Symbol FLOC    
Security Exchange Name NYSE