v3.26.1
ORGANIZATION AND BUSINESS OPERATIONS - Restructuring expenses and disposition of assets (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Restructuring Expense      
Accrued restructuring and reorganization costs $ 1,300    
Employee costs 944    
Consulting costs 781    
Restructuring and reorganization costs total 1,725 $ 1,830 $ 10,200
Operating segments | International Telecom      
Restructuring Expense      
Employee costs 745    
Restructuring and reorganization costs total 745 1,506  
Operating segments | US Telecom      
Restructuring Expense      
Employee costs 159    
Consulting costs 32    
Restructuring and reorganization costs total 191 134  
Corporate and Other      
Restructuring Expense      
Employee costs 40    
Consulting costs 749    
Restructuring and reorganization costs total 789 $ 190  
2026 Reorganization      
Restructuring Expense      
Accrued restructuring and reorganization costs 200    
Restructuring and reorganization costs total 1,700    
2026 Reorganization | Minimum      
Restructuring Expense      
Expected additional restructuring costs 3,000    
2026 Reorganization | Maximum      
Restructuring Expense      
Expected additional restructuring costs $ 4,000