Quarterly report pursuant to Section 13 or 15(d)

Balance Sheet Details - Cash and Investments (Details 1)

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Balance Sheet Details - Cash and Investments (Details 1) - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
Jun. 30, 2015
Dec. 31, 2014
Balance Sheet Related Disclosures [Abstract]        
Cash and cash equivalents $ 147,582 $ 67,956 $ 56,731 $ 20,696
Short-term investments, available-for-sale 28,899 43,300    
Long-term investments, available-for-sale 0 19,242    
Investments and Cash $ 176,481 $ 130,498