Note 6 - Stock-based Compensation - Option Activity (Details) $ / shares in Units, $ in Millions	9 Months Ended
	Nov. 26, 2023 USD ($) $ / shares shares	Feb. 26, 2023 USD ($)
Outstanding options (in shares) | shares	670,425
Balance, weighted average exercise price (in dollars per share) | $ / shares	$ 11.8
Outstanding aggregate intrinsic value | $	$ 2,474	$ 2,219
Outstanding options, granted (in shares) | shares	133,300
Granted, weighted average exercise price (in dollars per share) | $ / shares	$ 13.08
Outstanding options, exercised (in shares) | shares	(875)
Exercised, weighted average exercise price (in dollars per share) | $ / shares	$ 11.77
Outstanding options, terminated or expired (in shares) | shares	(4,750)
Terminated or expired, weighted average exercise price (in dollars per share) | $ / shares	$ 12.11
Outstanding options (in shares) | shares	798,100
Balance, weighted average exercise price (in dollars per share) | $ / shares	$ 12.01
Balance, weighted average remaining contractual term (Year)	5 years 9 months 7 days
Outstanding aggregate intrinsic value | $	$ 2,474
Vested and exercisable (in shares) | shares	480,306
Vested and exercisable, weighted average exercise price (in dollars per share) | $ / shares	$ 11.81
Vested and exercisable, weighted average remaining contractual term (Year)	3 years 11 months 23 days
Vested and exercisable, aggregate intrinsic value | $	$ 1,585