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BALANCE SHEET DETAILS - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Millions
1 Months Ended
Sep. 27, 2016
Aug. 22, 2016
Aug. 12, 2016
Aug. 09, 2016
Aug. 08, 2016
Sep. 30, 2016
Aug. 31, 2016
Oct. 01, 2016
Sep. 21, 2016
Jul. 02, 2016
Oct. 31, 2015
Feb. 19, 2015
Balance Sheet Components [Line Items]                        
Restricted cash and cash equivalents               $ 1.1        
Assets under capital lease               5.2   $ 5.9    
Expected amortization of intangible assets in fiscal year 2017               0.6        
Expected amortization of intangible assets in fiscal year 2018               $ 0.6        
Stated interest rate (percent)                     1.15%  
Stock issued in September (shares) 15,000,000                      
Common stock, par value (in usd per share)               $ 0.01 $ 0.01 $ 0.01    
Stock offering, price per share (in USD per share)                 $ 8.35      
Stock offering, underwriter option period 30 days                      
Proceeds from issuance of common stock, net $ 135.2         $ 135.2            
Other non-current assets                        
Balance Sheet Components [Line Items]                        
Restricted cash and cash equivalents noncurrent               $ 0.4        
Common Stock                        
Balance Sheet Components [Line Items]                        
Shares issued in settlement of debt (shares)   756,213 21,852,477 20,564,101 12,051,282   34,659,972          
Stock issued in September (shares)           17,250,000            
Underwriter option                        
Balance Sheet Components [Line Items]                        
Stock issued in September (shares) 2,250,000                      
Convertible Notes | 6.00% Convertible Senior Notes due 2020                        
Balance Sheet Components [Line Items]                        
Stated interest rate (percent)             6.00%         6.00%