v3.26.1
NONCONTROLLING INTERESTS - Changes in Ownership of OpCo Units in Nerdy LLC (Details) - shares
shares in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Dec. 31, 2024
Member Units                
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]                
Vesting or exercise of equity awards (in shares) 1,628   1,671   2,816 3,328    
Nerdy LLC                
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]                
Beginning balance, common (in shares) 189,144 187,956 183,751 182,094 187,956 182,094 182,094  
Ending balance, common (in shares) 190,772 189,144 185,422 183,751 190,772 185,422 187,956 182,094
Nerdy LLC | Nerdy Inc.                
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]                
Beginning balance, common (in shares) 125,414 123,561 119,356 117,699 123,561 117,699 117,699  
Conversion of combined interests into Class A Common Stock (in shares) 0   0   665 0    
Ending balance, common (in shares) 127,042 125,414 121,027 119,356 127,042 121,027 123,561 117,699
Ownership percentage, beginning and end of period 66.60% 66.30% 65.30% 65.00% 66.60% 65.30% 65.70% 64.60%
Nerdy LLC | Legacy Nerdy Holders                
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]                
Beginning balance, common (in shares) 63,730 64,395 64,395 64,395 64,395 64,395 64,395  
Conversion of combined interests into Class A Common Stock (in shares) 0   0   (665) 0    
Ending balance, common (in shares) 63,730 63,730 64,395 64,395 63,730 64,395 64,395 64,395
Ownership percentage, beginning and end of period 33.40% 33.70% 34.70% 35.00% 33.40% 34.70% 34.30% 35.40%
Nerdy Inc. | Member Units                
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]                
Vesting or exercise of equity awards (in shares) 1,628   1,671   2,816 3,328