v3.26.3
Commitments and Contingencies - Changes in Provision Balance for Restructuring and Other Charges (Details) - USD ($)
 6 Months Ended 12 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Restructuring Cost and Reserve [Line Items]    
Balance at the beginning of the period $ 2,085,000  
Restructuring and other expenses 5,004,000  
Reductions for payments (1,546,000)  
Foreign currency translation (58,000)  
Balance at the end of the period 5,485,000 $ 2,085,000
HMH Holding BV And Subsidiaries [Member]    
Restructuring Cost and Reserve [Line Items]    
Balance at the beginning of the period $ 2,085 1,042
Restructuring and other expenses   2,392,000
Reductions for payments   (1,498,000)
Foreign currency translation   149,000
Balance at the end of the period   $ 2,085