• Filing Date: 2018-05-10
  • Form Type: 10-Q
  • Description: Quarterly report
v3.8.0.1
5.0% Senior Unsecured Convertible Notes (Details)
$ / shares in Units, $ in Thousands
3 Months Ended
Jul. 26, 2017
USD ($)
d
$ / shares
Mar. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
[1]
Jul. 28, 2017
Apr. 18, 2017
5.0% Senior Unsecured Convertible Notes Due 2023          
Debt Instrument [Line Items]          
Convertible notes, net of discount   $ 68,929 $ 68,654    
Convertible Notes | 5.0% Senior Unsecured Convertible Notes Due 2023          
Debt Instrument [Line Items]          
Percentage of holders tendering exchange offer, minimum (as percent) 98.00%        
Stated interest rate (as percent)         5.00%
Convertible Notes | New Convertible Notes Indenture          
Debt Instrument [Line Items]          
Debt instrument issued $ 75,800        
Debt instrument, required percentage of trustees or holders to declare Notes immediately due and payable (as percent) 25.00%     25.00%  
Debt instrument, required percentage of principal for each day of default 0.25%        
Debt instrument, additional required percentage of principal for each day of restricted transfer default 0.25%        
Debt instrument, maximum required percentage of principal restricted transfer default 0.50%        
Debt instrument, debt default, special interest percentage of principal 0.50%        
Convertible Notes | New Convertible Notes          
Debt Instrument [Line Items]          
Debt instrument, conversion price (in usd per share) | $ / shares $ 2.00        
Debt instrument, conversion rate 0.5        
Debt instrument, redemption price, percentage (as percent) 100.00%        
Debt instrument, convertible, minimum percentage of common stock price (as percent) 120.00%        
Debt instrument, convertible, threshold trading days | d 15        
Debt instrument, convertible, threshold consecutive trading days | d 30        
Convertible notes, net of discount   68,900      
Unamortized debt discount   6,000      
Debt instrument origination cost   891      
Interest expense debt   1,200      
Interest included in interest expense   948      
Amortization of debt discounts   239      
Amortization of debt issuance costs   $ 35      
[1] Derived from audited consolidated financial statements.