Quarterly report pursuant to Section 13 or 15(d)

BALANCE SHEET COMPONENTS Balance Sheet Components (Details)

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BALANCE SHEET COMPONENTS Balance Sheet Components (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Mar. 31, 2016
Dec. 31, 2015
Condensed Balance Sheet Statements, Captions [Line Items]        
Cash and Cash Equivalents, at Carrying Value $ 134,672 $ 125,921 $ 99,631 $ 104,914
Accrued Sales Returns 2,229 1,632    
Accrued Employee Benefits, Current 7,332 10,541    
Accrued Warehousing And Inventory Related Expense 2,487 2,816    
Other Accrued Liabilities, Current 12,048 14,989    
Cash Equivalents [Member]        
Condensed Balance Sheet Statements, Captions [Line Items]        
Cash and Cash Equivalents, at Carrying Value 70,450 73,468    
Cash [Member]        
Condensed Balance Sheet Statements, Captions [Line Items]        
Cash and Cash Equivalents, at Carrying Value $ 64,222 $ 52,453