v3.26.3
Notes to Unaudited Pro Forma Consolidated Statement of Income - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Unaudited Pro Forma Consolidated Statement Of Income [Line Items]          
Net income $ (5,019) $ 9,768 $ (1,144) $ 15,646  
Net income attributable to non-controlling interests (9,995) 819 (9,568) 585  
Net income attributable to HMH Holding Inc. $ 4,976 $ 8,949 $ 8,424 $ 15,061  
Weighted average shares of Class A common stock outstanding (basic) 11,662,000 69,355,000 5,863,000 69,355,000  
Weighted average shares of Class A common stock outstanding (diluted) 11,971,000 69,355,000 6,688,000 69,355,000  
Pro Forma [Member] | HMH Holding Inc. [Member]          
Unaudited Pro Forma Consolidated Statement Of Income [Line Items]          
Net income         $ 35,155
Net income attributable to non-controlling interests         26,737
Net income attributable to HMH Holding Inc.         $ 8,418
Weighted average shares of Class A common stock outstanding (basic)         11,422,504
Incremental common shares attributable to dilutive securities         0
Weighted average shares of Class A common stock outstanding (diluted)         11,422,504
Earnings per share – basic         $ 0.74
Earnings per share – diluted         $ 0.74