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Long-Term Investments - Equity Investments with Carrying Value (Detail) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Schedule of Equity and Cost Investments [Line Items]    
Long-term investments $ 8,541 $ 5,000
Cashido Corp. (Cashido)    
Schedule of Equity and Cost Investments [Line Items]    
Equity Investments Percentage of Ownership 0.60% 0.60%
Vastview Technology, Corp. (Vastview)    
Schedule of Equity and Cost Investments [Line Items]    
Equity Investments Percentage of Ownership 2.90% 2.90%
Deep Vision, Inc (Deep Vision)    
Schedule of Equity and Cost Investments [Line Items]    
Long-term investments $ 6,500 $ 5,000
Equity Investments Percentage of Ownership 14.40% 16.20%
BIWIN Storage Technology Corp.(BIWIN)    
Schedule of Equity and Cost Investments [Line Items]    
Long-term investments $ 2,041  
Equity Investments Percentage of Ownership 0.30%