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Organization and Summary of Significant Accounting Policies (ASU 2016-09) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Sep. 30, 2017
Dec. 31, 2016
Recently Issued Accounting Pronouncements      
Accumulated deficit   $ (247,824) $ (242,088)
ASU 2016-09      
Recently Issued Accounting Pronouncements      
Cumulative-effect adjustment $ 11,600    
Deferred tax assets 11,600    
Deferred tax assets valuation allowance 11,600    
Accumulated deficit $ (11,600)