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Stock-based Compensation and Stockholders’ Equity - Narrative (Details) - USD ($)
12 Months Ended
May 31, 2020
May 26, 2019
May 27, 2018
Oct. 19, 2017
May 28, 2017
Oct. 10, 2013
Jul. 14, 2010
Oct. 15, 2009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Options to purchase restricted stock units outstanding (in shares) 1,716,358 2,000,096 1,955,335   1,571,542      
Amount of shares and RSUs outstanding to be purchased (in shares) 128,500              
Number of shares available for award under stock incentive plan (in shares) 4,800,000              
Preferred stock authorized (in shares) 2,000,000.0              
Preferred stock outstanding (in shares) 0              
Maximum repurchase amount of common stock             $ 10,000,000.0  
Stock repurchased during period (in shares) 0 0 0          
Employee Stock Option                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Amount of unrecognized compensation expense related to unvested equity compensation $ 4,100,000              
Total expense expected to be recognized over the weighted-average period 2 years 4 months 24 days              
Restricted Stock Units (RSUs)                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Options to purchase restricted stock units outstanding (in shares) 579,000              
Total expense expected to be recognized over the weighted-average period 1 year 11 months 23 days              
Stock Incentive Plan 2013                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Common stock initially available under stock award plan (in shares)       1,000,000.0   2,000,000.0    
Amount of shares and RSUs outstanding to be purchased (in shares) 1,478,405              
Stock Incentive Plan 2013 | Employee Stock Option                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Maximum amount of award within a fiscal year (in shares) 500,000              
Stock Incentive Plan 2013 | Stock Grants and Stock Units                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Maximum amount of award within a fiscal year (in shares) 250,000              
Stock Incentive Plan 2013 | Stock Appreciation Rights (SARs)                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Maximum amount of award within a fiscal year (in shares) 500,000              
Maximum award for a non-employee direct within a fiscal year $ 120,000              
Stock Incentive Plan 2009                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Common stock initially available under stock award plan (in shares)               1,900,000