Quarterly report pursuant to Section 13 or 15(d)

Business Combinations - Schedule of Consideration Transferred (Details)

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Business Combinations - Schedule of Consideration Transferred (Details) - USD ($)
$ in Thousands
 1 Months Ended 3 Months Ended 6 Months Ended
Jul. 27, 2017
Jul. 27, 2016
Jun. 30, 2017
Jun. 30, 2017
Jun. 30, 2016
Business Acquisition [Line Items]          
Working capital settlement adjustment       $ (15,483) $ 0
Emerging Markets Communications LLC          
Business Acquisition [Line Items]          
Cash consideration paid   $ 100,454      
5,466,886 Company common shares multiplied by the $8.03 closing share price per share of on July 27, 2016, less a 7.5% discount for restrictions on transferability, value   40,607      
Deferred consideration   25,000      
Settlement of pre-existing relationship   228      
Working capital settlement adjustment     $ (1,250)    
Consideration transferred   $ 165,039      
Restrictions on transferability of common stock, discount rate   7.50%      
Subsequent Event | Emerging Markets Communications LLC          
Business Acquisition [Line Items]          
Common stock issued for acquisition (in shares) 5,080,049        
Common Stock | Emerging Markets Communications LLC          
Business Acquisition [Line Items]          
Common stock issued for acquisition (in shares)   5,466,886