v3.26.1
Summary of Significant Accounting Policies - Summary of Revision to Previously Filed Statement of Balance Sheet (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Sep. 30, 2025
Jun. 30, 2025
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Additional paid-in capital $ 340,198 $ 40,731 $ 31,836 $ (0)
Retained earnings 24,940 187,886 339,113 150,340
Total stockholders' equity to Flowco Holdings Inc. 365,147 228,626 370,958 150,349
Class A Common Stock        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Common Stock 4 3 3 3
Class B Common Stock        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Common Stock $ 5 6 6 6
As Reported        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Additional paid-in capital   69,279 55,539 18,113
Retained earnings   159,338 315,410 132,227
Total stockholders' equity to Flowco Holdings Inc.   228,626 370,958 150,349
As Reported | Class A Common Stock        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Common Stock   3 3 3
As Reported | Class B Common Stock        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Common Stock   6 6 6
Adjustment        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Additional paid-in capital   (28,548) (23,703) (18,113)
Retained earnings   28,548 23,703 18,113
Total stockholders' equity to Flowco Holdings Inc.   0 0 0
Adjustment | Class A Common Stock        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Common Stock   0 0 0
Adjustment | Class B Common Stock        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Common Stock   $ 0 $ 0 $ 0