Note 4 - Accounts and Other Receivables (Details Textual)
$ in Thousands
3 Months Ended
Aug. 11, 2016
Jun. 14, 2016
Jun. 01, 2016
USD ($)
May 31, 2016
USD ($)
Aug. 30, 2016
USD ($)
Sep. 01, 2015
USD ($)
Lime Fresh [Member] | Pre-amendment [Member]            
Disposal Group, Including Discontinued Operation, Consideration       $ 6,000    
Lime Fresh [Member] | Six Restaurants Meeting the Closing Requirements [Member]            
Disposal Group, Including Discontinued Operation, Consideration       5,000    
Lime Fresh [Member] | Buyer of Lime Fresh Restuarants [Member]            
Proceeds from Sale of Property, Plant, and Equipment     $ 5,000      
Lime Fresh [Member] | Buyer of Lime Fresh Brand [Member]            
Disposal Group, Including Discontinued Operation, Consideration       $ 300 $ 100  
Lime Fresh [Member]            
Sale of Assets, Number of Buyers       2    
Number of Company-owned Restaurants Agreed During the Period to Sell       8    
Disposal Group, Including Discontinued Operation, Consideration       $ 5,300    
Company-owned Restaurants Agreed to Sell, Number of Restaurants for Which Closing Requirements Were Satisfied       6    
Sale of Assets, Amount to Be Received, Holdback Until Transfer of All Remaining Restaurants       $ 1,000 1,000  
Sale of Assets, Number of Restaurants Remaining to Be Closed and Transferred to the Buyer       2    
Number of Restaurants Closed       6    
Number of Restaurants Sold   1        
Disposal Group, Including Discontinued Operation, Consideration       $ 5,289 $ 140  
Number of Restaurants Closed 95       99  
Proceeds from Sale of Property, Plant, and Equipment         $ 5,257 $ 2,746