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Equity Investments with Carrying Value (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Schedule of Cost-method Investments [Line Items]    
Long-term investments $ 133 $ 133
Cashido Corp. (Cashido)    
Schedule of Cost-method Investments [Line Items]    
Long-term investments $ 104 $ 104
Equity Investments Percentage of Ownership 2.10% 2.10%
Vastview Technology, Corp. (Vastview)    
Schedule of Cost-method Investments [Line Items]    
Long-term investments $ 29 $ 29
Equity Investments Percentage of Ownership 2.90% 2.90%