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Note 5 - Stock-based Compensation - Option Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Mar. 01, 2020
Mar. 03, 2019
Feb. 25, 2018
Outstanding options (in shares) 540,709 885,554 1,070,529
Balance, weighted average exercise price (in dollars per share) $ 13.49 $ 17.55 $ 21.08
Outstanding options, granted (in shares) 114,450 2,650
Granted, weighted average exercise price (in dollars per share) $ 15.44 $ 13.50
Outstanding options, exercised (in shares) (32,873) (244,382) (6,900)
Exercised, weighted average exercise price (in dollars per share) $ 11.64 $ 12.18 $ 13.36
Outstanding options, terminated or expired (in shares) (111,652) (103,113) (178,075)
Terminated or expired, weighted average exercise price (in dollars per share) $ 15.95 $ 18.75 $ 22.55
Outstanding aggregate intrinsic value $ 746 $ 227  
Outstanding options (in shares) 510,634 540,709 885,554
Balance, weighted average exercise price (in dollars per share) $ 12.45 $ 13.49 $ 17.55
Balance, weighted average remaining contractual term (Year) 5 years 76 days    
Vested and exercisable, March 1, 2020 (in shares) 400,659    
Vested and exercisable, March 1, 2020 (in dollars per share) $ 12.64    
Vested and exercisable, March 1, 2020 (Year) 4 years 43 days    
Vested and exercisable, March 1, 2020 $ 509    
Expected to vest, March 1, 2020 (in shares) 479,996    
Expected to vest, March 1, 2020 (in dollars per share) $ 12.45    
Expected to vest, March 1, 2020 (Year) 5 years 76 days    
Expected to vest, March 1, 2020 $ 701