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Other Income (Expense), Net - Components of Other Income (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Other Income and Expenses [Abstract]      
Interest income $ 47 $ 80 $ 97
Foreign currency losses, net (161) (196) (94)
Gain on disposal of equipment 60 22 26
Credit gains (losses) on available for sale securities 12 311 (78)
Other 67 51 51
Total other income (expense), net $ 25 $ 268 $ 2