Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity and Share-Based Compensation - Share-Based Compensation Plan Information (Details)

v3.20.1
Stockholders' Equity and Share-Based Compensation - Share-Based Compensation Plan Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
May 31, 2016
Dec. 28, 2019
Dec. 29, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Weighted average fair value of options granted (in dollars per share)   $ 0.63 $ 1.11
Intrinsic value, options exercised   $ 96 $ 1
Unrecognized share-based compensation expense   $ 2,379  
Weighted-average period of unrecognized compensation expense   2 years 11 months 5 days  
Number of shares granted (in shares)   4,460,000 1,174,000
Consulting agreement      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares granted (in shares)   600,000  
2016 Equity Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Maximum number of shares authorized to issued under condition one (in shares) 2,500,000    
Shares available for future grants (in shares) 3,894,000 5,291,000  
Period of share reserve increase 9 years    
Share reserve (in shares) 1,500,000    
Expiration period 10 years    
Option grant vesting period 4 years    
Exercise price of option grants 100.00%    
Employee Stock Option      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares withheld to satisfy employee tax obligations (in shares)   0 0
Adjustment related employee tax obligations   $ 0 $ 0