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
Sep. 30, 2016
Dec. 31, 2015
Sep. 30, 2015
Dec. 31, 2014
Cash and cash equivalents        
Cash $ 43,454 $ 52,164    
Money market accounts 39,793 6,725    
Total cash and cash equivalents 86,009 66,106 $ 55,090 $ 56,836
Marketable securities        
Marketable securities 22,331 16,793    
Cash Equivalents        
Cash and cash equivalents        
Certificates of deposit 2,762 7,217    
Certificates Of Deposit        
Marketable securities        
Marketable securities 12,020 $ 16,793    
Corporate Bonds        
Marketable securities        
Marketable securities $ 10,311