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8.5% Senior Secured Notes (Details) - USD ($)
1 Months Ended 3 Months Ended 12 Months Ended
Aug. 14, 2017
Aug. 11, 2017
Jul. 28, 2017
Aug. 31, 2017
Feb. 29, 2020
Feb. 28, 2019
Nov. 30, 2019
Feb. 11, 2019
Jan. 30, 2019
Dec. 28, 2018
Dec. 10, 2018
Jan. 10, 2018
Dec. 31, 2017
Dec. 29, 2016
Stock Purchase Agreement                            
Debt Instrument [Line Items]                            
Sale of stock, price per share (in dollars per share)     $ 0.20                      
Sale of stock, number of shares issued (in shares)     115,000,000                      
Brennan | Stock Purchase Agreement                            
Debt Instrument [Line Items]                            
Securities remaining for future issuance (shares)   12,500,000   12,500,000                    
Sale of stock, price per share (in dollars per share)   $ 0.40   $ 0.40                    
Sale of stock, aggregate purchase price   $ 5,000,000   $ 5,000,000                    
Sale of stock, number of shares issued (in shares) 3,750,000 8,750,000                        
8.5% Senior Secured Notes                            
Debt Instrument [Line Items]                            
Debt interest rate     8.50%   8.50%                  
Debt issued   $ 5,000,000.0 $ 30,000,000                      
Debt repurchase amount                 $ 1,500,000 $ 4,300,000     $ 24,500,000  
Debt repurchased                 $ 2,000,000 5,700,000        
Additional interest rate percentage to be paid to holders who accept interest paid-in-kind interest                     3.00%      
Senior notes, net         $ 45,933,000   $ 45,675,000 [1]              
8.5% Senior Secured Notes | Board of Directors Member                            
Debt Instrument [Line Items]                            
Debt repurchase amount                   1,500,000        
Debt repurchased                   $ 2,000,000        
8.5% Senior Secured Notes | Brennan                            
Debt Instrument [Line Items]                            
Debt repurchase amount               $ 967,000            
Debt repurchased               $ 725,000            
Brennan Notes | Brennan | Stock Purchase Agreement                            
Debt Instrument [Line Items]                            
Debt repurchased $ 1,500,000 $ 3,500,000                        
15.0% Senior Secured Notes                            
Debt Instrument [Line Items]                            
Debt interest rate     15.00%                      
New Convertible Notes Indenture                            
Debt Instrument [Line Items]                            
Debt issued     $ 40,000,000.0               $ 70,000,000.0      
Paid-in-kind interest payable                     26,800,000      
Paid-in-kind interest payable in cash                     $ 8,200,000      
Additional debt issuance             $ 4,000,000              
Convertible Notes | New Convertible Notes Indenture                            
Debt Instrument [Line Items]                            
Debt issued     $ 75,800,000                      
Debt instrument, required percentage pledged to equity interest     65.00%                      
Debt covenant, percent of equity interests pledged as collateral                       65.00%    
Debt instrument, required percentage of trustees or holders to declare notes immediately due and payable     25.00%                      
Senior Secured Notes | New Senior Secured Notes                            
Debt Instrument [Line Items]                            
Percentage of senior debt to be purchased, maximum     100.00%                      
Senior Secured Notes | 8.5% Senior Secured Notes                            
Debt Instrument [Line Items]                            
Debt issued         47,600,000                  
Senior notes, net         45,900,000                  
Debt unamortized discount         1,400,000                  
Unamortized debt issuance costs         311,000                  
Interest expense debt         1,300,000 $ 1,500,000                
Interest included in interest expense         1,000,000 1,300,000                
Amortization of debt origination costs         51,000 143,000                
Amortization of debt discounts         $ 208,000 $ 60,000                
Senior Secured Notes | 15.0% Senior Secured Notes                            
Debt Instrument [Line Items]                            
Debt issued                           $ 69,600,000.0
Senior Secured Notes | 15.0% Senior Secured Notes | Change in control                            
Debt Instrument [Line Items]                            
Debt instrument, redemption price, percentage     107.50%                      
[1] Derived from audited consolidated financial statements.