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Stock-Based Compensation - Performance Stock Units (Details) - USD ($)
1 Months Ended 12 Months Ended
May 10, 2017
May 31, 2017
May 31, 2016
Mar. 26, 2017
Mar. 27, 2016
Mar. 29, 2015
Performance Stock Units            
Stock-based compensation            
Measurement period       1 year    
Calculated estimated forfeiture rate (as a percent)       0.00%    
PSU Activity            
Unvested shares available for issue under outstanding PSUs, beginning of period (in shares)       138,925 203,841 317,127
Granted (in shares)       207,000 103,000 91,000
Vested (in shares)       (27,671) (87,648) (125,347)
Forfeited/cancelled (in shares)       (148,154) (80,268) (78,939)
Unvested shares available for issue under outstanding PSUs, end of period (in shares)       170,100 138,925 203,841
Unvested PSUs, Weighted-Average Fair Value at Grant Date            
Unvested shares available for issue under outstanding PSUs, beginning of period (in dollars per share)       $ 21.46 $ 20.65 $ 15.96
Granted (in dollars per share)       10.77 22.15 29.28
Vested (in dollars per share)       19.40 13.88 14.44
Forfeited/cancelled (in dollars per share)       18.72 28.57 21.61
Unvested shares available for issue under outstanding PSUs, end of period (in dollars per share)       $ 11.17 $ 21.46 $ 20.65
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]            
Unrecognized compensation costs (in dollars)       $ 0    
Total fair value of shares vested during period (in dollars)       $ 628,200 $ 2,543,000 $ 4,364,500
Canceled shares, performance targets not fully satisfied (in shares)     103,000      
Canceled shares, employee departures (in shares)       45,154    
Shares earned, but not yet vested (in shares)       7,600    
Performance Stock Units | Subsequent Event            
PSU Activity            
Forfeited/cancelled (in shares) (162,500)          
Performance Stock Units | Subsequent Event | Forecast            
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]            
Canceled shares, performance targets not fully satisfied (in shares)   162,500        
Stock Options | Senior management            
Stock-based compensation            
Number of fiscal years over which stock option grants have been made to senior management       2 years    
Award Date May 10, 2017 | Performance Stock Units | Subsequent Event            
Stock-based compensation            
Measurement period 1 year          
PSU Activity            
Granted (in shares) 76,000          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]            
Annual vesting percentage 25.00%