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Stock-Based Compensation - RSUs (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 12 Months Ended
May 10, 2017
May 11, 2016
May 11, 2015
May 08, 2014
Sep. 24, 2006
Mar. 26, 2017
Mar. 27, 2016
Restricted Stock              
Stock-based compensation              
Unvested shares outstanding (in shares)           0  
Restricted Stock | President and Chief Executive Officer              
Stock-based compensation              
Granted (in shares)         225,000    
Vesting period         10 years    
Weighted-average grant date fair value (in dollars per share)         $ 10.56    
Vested (in shares)           22,500 22,500
Award Date May 8, 2014 | RSU awards | Non-employee director              
Stock-based compensation              
Granted (in shares)       10,000      
Annual vesting percentage       25.00%      
Unrecognized compensation costs (in dollars)           $ 0.1  
Unrecognized compensation costs, period for recognition           1 year  
Award Date May 11, 2015 | RSU awards | Non-employee director              
Stock-based compensation              
Granted (in shares)     10,000        
Annual vesting percentage     25.00%        
Unrecognized compensation costs (in dollars)           $ 0.1  
Unrecognized compensation costs, period for recognition           2 years  
Award Date May 11, 2016 | RSU awards              
Stock-based compensation              
Annual vesting percentage   25.00%          
Award Date May 11, 2016 | RSU awards | Non-employee director              
Stock-based compensation              
Granted (in shares)   10,000          
Unrecognized compensation costs (in dollars)           $ 0.1  
Subsequent Event | Award Date May 10, 2017 | RSU awards | Non-employee director              
Stock-based compensation              
Granted (in shares) 18,000            
Annual vesting percentage 25.00%