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Restructuring - Schedule of Components of Restructuring Expenses Including in Condensed Consolidated Statements of (Loss) Income (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2021
Restructuring Cost And Reserve [Line Items]          
Total restructuring expenses $ 0 $ 8 $ 2 $ 309 $ 411
Cost of Revenue [Member]          
Restructuring Cost And Reserve [Line Items]          
Total restructuring expenses 0 0 0 15  
Selling, General and Administrative Expenses [Member]          
Restructuring Cost And Reserve [Line Items]          
Total restructuring expenses 0 3 2 145  
Research and Development Expenses [Member]          
Restructuring Cost And Reserve [Line Items]          
Total restructuring expenses 0 5 0 149  
Network Solutions [Member] | Cost of Revenue [Member]          
Restructuring Cost And Reserve [Line Items]          
Total restructuring expenses 0 0 0 12  
Services & Support [Member] | Cost of Revenue [Member]          
Restructuring Cost And Reserve [Line Items]          
Total restructuring expenses $ 0 $ 0 $ 0 $ 3