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Stock-Based Compensation - RSUs (Details) - RSU awards
$ / shares in Units, $ in Millions
9 Months Ended 17 Months Ended
Oct. 23, 2018
$ / shares
shares
Jun. 06, 2018
shares
May 10, 2018
item
individual
shares
Aug. 08, 2017
$ / shares
shares
Dec. 30, 2018
USD ($)
shares
Dec. 30, 2018
USD ($)
shares
Stock-based compensation            
Unrecognized compensation costs (in dollars) | $         $ 0.8 $ 0.8
Unrecognized compensation costs, period for recognition         3 years  
Non-employee directors and Executive Chairman            
Stock-based compensation            
Granted (in shares)     18,000      
Number of equal installments of vesting | item     4      
Number of anniversaries after first vesting date on which share-based compensation awards vest | item     3      
Non-employee directors            
Stock-based compensation            
Granted (in shares)   3,000        
Number of individuals that received stock awards | individual     5      
Senior executives            
Stock-based compensation            
Granted (in shares) 2,000     56,000   58,000
Denominator in fraction used to calculate number of awards earned | $ / shares $ 3.20     $ 3.20    
Cancelled (in shares)           8,000
Shares outstanding (in shares)         50,000 50,000
Senior executives | Maximum            
Stock-based compensation            
Vesting period 4 years     4 years