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Subsequent Events - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended
Apr. 25, 2019
Mar. 31, 2019
Mar. 31, 2018
Apr. 01, 2019
Subsequent Event [Line Items]        
Proceeds from long-term debt   $ 33,132 $ 20,303  
Subsequent Event [Member] | Indonesian Subsidiary [Member] | PNC Bank National Association [Member]        
Subsequent Event [Line Items]        
Proceeds from long-term debt $ 8,000      
Interest rate percentage on borrowings 3.501%      
Term loan facility, expiration date Apr. 30, 2024      
Subsequent Event [Member] | Maximum [Member] | Micos Telecom [Member]        
Subsequent Event [Line Items]        
Percentage of assets acquired not considered as material       5.00%