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Summary of Significant Accounting Policies (Details)
$ / shares in Units, $ in Thousands
9 Months Ended
Aug. 24, 2020
$ / shares
shares
Aug. 31, 2020
USD ($)
derivative
lease
$ / shares
Dec. 01, 2019
USD ($)
Nov. 30, 2019
USD ($)
$ / shares
Cash and Cash Equivalents        
Cash equivalents   $ 27,561   $ 4,299
Recent Adopted Accounting Pronouncements        
Number of operating leases | lease   2    
Right-of-use assets   $ 744 $ 858  
Lease liabilities   $ 775 $ 858  
Common stock, par value (in dollars per share) | $ / shares   $ 0.01   $ 0.01
Interest rate swap agreement        
Interest Rate Swap Agreements        
Number of Interest Rate Derivatives Held | derivative   13    
Cambiar | Securities Purchase Agreement        
Recent Adopted Accounting Pronouncements        
Sale of common stock | shares 504,590      
Common stock, par value (in dollars per share) | $ / shares $ 0.01