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Acquisition - Additional Information (Detail) - USD ($)
1 Months Ended
Mar. 31, 2016
May 31, 2016
Feb. 29, 2016
Business Acquisition [Line Items]      
Goodwill   $ 70,160,000 $ 69,595,000
Measurement period of fair value of assets acquired and liabilities assumed 1 year    
Sookasa, Inc.      
Business Acquisition [Line Items]      
Business acquisition, aggregate cash consideration to acquire Sookasa Inc. $ 300,000    
Business acquisition, issuance of common stock to acquire Sookasa Inc. (in shares) 10,000    
Business acquisition, aggregate consideration transferred to acquire Sookasa Inc. $ 400,000    
Goodwill 400,000    
Goodwill deductible for income tax purpose $ 0