Note 6 - Stock-based Compensation - Option Activity (Details) $ / shares in Units, $ in Thousands	9 Months Ended
	Nov. 29, 2020 USD ($) $ / shares shares	Mar. 01, 2020 USD ($)
Outstanding options (in shares) | shares	510,634
Balance, weighted average exercise price (in dollars per share) | $ / shares	$ 12.45
Outstanding, aggregate intrinsic value | $	$ 592	$ 480
Outstanding options, granted (in shares) | shares	132,100
Granted, weighted average exercise price (in dollars per share) | $ / shares	$ 12.55
Outstanding options, exercised (in shares) | shares
Exercised, weighted average exercise price (in dollars per share) | $ / shares
Outstanding options, terminated or expired (in shares) | shares	(5,850)
Terminated or expired, weighted average exercise price (in dollars per share) | $ / shares	$ 12.88
Outstanding options (in shares) | shares	636,884
Balance, weighted average exercise price (in dollars per share) | $ / shares	$ 12.46
Balance, weighted average remaining contractual term (Year)	5 years 160 days
Outstanding options, vested and exercisable (in shares) | shares	427,709
Vested and exercisable, weighted average exercise price (in dollars per share) | $ / shares	$ 11.88
Vested and exercisable, weighted average remaining contractual term (Year)	3 years 251 days
Vested and exercisable, aggregate intrinsic value | $	$ 646