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Credit Line and Notes - Convertible Senior Notes due 2020 (Details)
1 Months Ended 3 Months Ended 12 Months Ended
Aug. 22, 2016
USD ($)
shares
Aug. 12, 2016
shares
Aug. 09, 2016
USD ($)
shares
Aug. 08, 2016
USD ($)
shares
Feb. 19, 2015
USD ($)
d
$ / shares
shares
Aug. 31, 2016
USD ($)
shares
Oct. 01, 2016
USD ($)
Jul. 01, 2017
USD ($)
Jul. 02, 2016
USD ($)
Jun. 27, 2015
USD ($)
Debt Instrument [Line Items]                    
Proceeds from the sale of convertible notes, net               $ 0 $ 0 $ 60,941,000
Interest expense paid               13,313,000 3,936,000 $ 123,000
6.00% Convertible Senior Notes due 2020                    
Debt Instrument [Line Items]                    
Debt discount               0 2,942,000  
Convertible Notes | 6.00% Convertible Senior Notes due 2020                    
Debt Instrument [Line Items]                    
Principal value of the liability component $ 1,400,000.0   $ 40,100,000.0 $ 23,500,000.0 $ 65,000,000          
Stated interest rate (percent)         6.00% 6.00%        
Initial exchange price (in usd per share) | $ / shares         $ 1.95          
Percentage of stock price         100.00%          
Proceeds from the sale of convertible notes, net         $ 61,600,000          
Debt discount         3,400,000     2,500,000    
Offering expenses         $ 600,000          
Threshold trading days | d         20          
Threshold consecutive trading days | d         30          
Threshold trading days immediately prior to notice of conversion         5 days          
Threshold percentage of stock price trigger         130.00%          
Redemption price, percentage         100.00%          
Number of additional shares that can be converted (shares, up to) | shares         11,200,000.0          
Payment on 6% Notes           $ 4,700,000        
Interest expense               4,700,000 1,700,000  
Interest expense paid               3,900,000 $ 0  
Issuance costs               $ 500,000    
Common Stock                    
Debt Instrument [Line Items]                    
Shares issued in settlement of debt (shares) | shares 756,213 21,852,477 20,564,101 12,051,282   34,659,972        
Interest (Income) Expense, Net | Convertible Notes | 6.00% Convertible Senior Notes due 2020                    
Debt Instrument [Line Items]                    
Interest expense             $ 5,900,000      
Other Nonoperating Income (Expense) | Convertible Notes | 6.00% Convertible Senior Notes due 2020                    
Debt Instrument [Line Items]                    
Induced conversion of convertible debt expense             $ 7,400,000