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Stock-Based Compensation (Details 3) - USD ($)
shares in Thousands, $ in Millions
 12 Months Ended
Nov. 30, 2018
Dec. 01, 2017
Dec. 02, 2016
Existing Non-Employee Directors [Member]      
Share-based Goods and Non-employee Services Transaction [Line Items]      
Non-Employee Director Aggregate Grant Value Per Award $ 0.3    
Annual Vesting Percentage For Director Grants 100.00%    
New Non-Employee Directors [Member]      
Share-based Goods and Non-employee Services Transaction [Line Items]      
Non-Employee Director Aggregate Grant Value Per Award $ 0.3    
Annual Vesting Percentage For Director Grants 100.00%    
Restricted Stock Unit [Member] | Existing Non-Employee Directors [Member]      
Share-based Goods and Non-employee Services Transaction [Line Items]      
Restricted Stock Units Granted to Existing Directors 11 18 25
Numbers of Days Used to Calculate Average Stock Price 30 days    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 1 year    
Restricted Stock Units Granted To New Directors 1 0 0
Restricted Stock Unit [Member] | New Non-Employee Directors [Member]      
Share-based Goods and Non-employee Services Transaction [Line Items]      
Numbers of Days Used to Calculate Average Stock Price 30 days    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 1 year