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Employee Benefit Plans - Long-Term Incentive Plans (Details) - USD ($)
$ in Thousands
12 Months Ended
May 23, 2018
Jan. 01, 2022
Mar. 31, 2016
Nonemployee director | Restricted stock units      
Long-Term Incentive Plans      
Value of awards granted   $ 130  
Vesting percentage of awards granted   100.00%  
Reduction of annual grant 25.00%    
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