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Stock Options and Stock Awards- Restricted Stock, etc. (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
6 Months Ended
Aug. 31, 2019
Sep. 01, 2018
Additional General Disclosures    
Total awards (in shares) 1,735 25
Restricted shares    
Stock options and stock award Plans    
Vesting period 3 years  
Restricted stock, Shares activity    
Granted (in shares) 1,232 25
Restricted stock, Fair value    
Granted (in dollars per share) $ 7.60 $ 33.40
Unrecognized pre-tax compensation costs related to unvested stock options and restricted stock grants    
Unrecognized pre-tax costs $ 16,518  
Weighted average amortization period 2 years 2 months 12 days  
Performance based awards    
Unrecognized pre-tax compensation costs related to unvested stock options and restricted stock grants    
Unrecognized pre-tax costs $ 246  
Weighted average amortization period 6 months