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Stock-Based Compensation - RSUs (Details) - RSU awards - USD ($)
$ in Millions
3 Months Ended
May 11, 2016
Dec. 25, 2016
Stock-based compensation    
Unrecognized compensation costs (in dollars)   $ 0.3
Unrecognized compensation costs, period for recognition   2 years
Non-employee director    
Stock-based compensation    
Granted (in shares) 10,000  
Vesting period 4 years