Accounts Payable and Accrued Liabilities - Components of Accounts Payable and Accrued Liabilities (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Payables and Accruals [Abstract]
Accounts payable	$ 2,089	$ 2,121
Accrued network costs	828	917
Accrued taxes	3,083	3,465
Accrued outside services	1,091	1,171
Accrued other	1,279	1,573
Total accounts payable and accrued liabilities	$ 8,370	$ 9,247