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Organization and Summary of Significant Accounting Policies (Error Correction) (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Statement of Operations:    
Interest expense $ (4,420) $ (10,290)
Total other expense, net (3,352) (10,088)
Net loss 16,700 $ (59,223)
Net loss per share, basic and diluted (in dollars per share)   $ (0.26)
Statements of Comprehensive Loss:    
Comprehensive loss 16,790 $ (59,033)
Statements of Cash Flows:    
Net loss 16,700 (59,223)
Accretion of debt discount and debt issuance costs $ 89 3,161
Restatement Adjustment [Member] | Correction of Amortization of Debt Discount Associated with the 2019 Notes [Member]    
Statement of Operations:    
Interest expense   2,124
Total other expense, net   2,124
Net loss   $ 2,124
Net loss per share, basic and diluted (in dollars per share)   $ 0.01
Statements of Comprehensive Loss:    
Comprehensive loss   $ 2,124
Statements of Cash Flows:    
Net loss   2,124
Accretion of debt discount and debt issuance costs   $ (2,124)