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Employee Benefit Plans - Long-Term Incentive Plans (Details) - USD ($)
12 Months Ended
May 20, 2020
May 23, 2018
Jan. 02, 2021
Mar. 31, 2016
Long-Term Incentive Plans        
Price used to calculate value of the annual grant (in dollars per share)     $ 15.00  
Price midpoint at date of annual grant $ 2.86      
Nonemployee director | Restricted stock units        
Long-Term Incentive Plans        
Value of awards granted     $ 130,000  
Vesting percentage of awards granted     100.00%  
Reduction of annual grant   25.00%    
Restricted stock units fair market value   $ 18,600    
2016 long term incentive plan        
Long-Term Incentive Plans        
Number of common shares reserved for issuance (in shares)   10,288,468   3,000,000
Number of additional shares of common stock (in shares)   5,000,000    
Term of award under the plan     10 years  
Vesting period     3 years  
2008 long term incentive plan        
Long-Term Incentive Plans        
Number of additional shares of common stock (in shares)   2,288,468