Deferred revenue and income - Schedule of Deferred Revenue and Income (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Deferred Revenue Arrangement [Line Items]    
Deferred revenue and income, Total $ 30,496 $ 34,570
Less: non-current portion [1] (5,383) (6,825)
Deferred revenue and income, current portion 25,113 27,745
Membership subscription revenues [Member]    
Deferred Revenue Arrangement [Line Items]    
Deferred revenue and income, Total 24,502 27,543
Less: non-current portion (719) (1,120)
Online game revenues [Member]    
Deferred Revenue Arrangement [Line Items]    
Deferred revenue and income, Total $ 1,120 $ 1,111
Pay per view subscription revenues [Member]    
Deferred Revenue Arrangement [Line Items]    
Deferred revenue and income, Total
Government grants [Member]    
Deferred Revenue Arrangement [Line Items]    
Deferred revenue and income, Total $ 4,032 $ 4,863
Less: non-current portion (4,032) (4,863)
Reimbursement from the depository [Member]    
Deferred Revenue Arrangement [Line Items]    
Deferred revenue and income, Total [2] 842 1,053
Less: non-current portion $ (632) $ (842)
[1] As of December 31, 2015, the non-current portion included Membership subscription revenue of USD 719 thousand (2014: USD 1,120 thousand), Government grants of USD 4,032 thousand (2014: USD 4,863 thousand), and Reimbersement from the depositary of USD 632 thousand (2014: 842 thousand).
[2] In December of 2014, the Company received from its depositary a reimbursement of USD 1.2 million, net of withholding tax of USD0.3 million. This reimbursement was recognized as deferred income and amortized over the depositary service period of 5 years.