Quarterly report pursuant to Section 13 or 15(d)

Balance Sheet Components - Summary of Cash, Cash Equivalents and Short-term Investments (Details)

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Balance Sheet Components - Summary of Cash, Cash Equivalents and Short-term Investments (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Mar. 31, 2016
Dec. 31, 2015
Cash and cash equivalents        
Cash $ 51,200 $ 48,533    
Money market accounts 46,162 39,277    
Certificates of deposit 1,718 5,041    
Corporate bonds 6,025      
Total cash and cash equivalents 105,105 92,851 $ 72,400 $ 66,106
Marketable securities        
Marketable securities 23,135 21,033    
Certificates Of Deposit        
Marketable securities        
Marketable securities 11,864 10,855    
Corporate Bonds        
Marketable securities        
Marketable securities 7,270 $ 10,178    
Agency Mortgage-backed Securities        
Marketable securities        
Marketable securities $ 4,001