Note 5 - Stock-based Compensation - Non-vested Options (Details) - $ / shares	12 Months Ended
	Feb. 27, 2022	Feb. 28, 2021	Mar. 01, 2020
Non-vested, balance (in shares)	208,375
Non-vested, balance, weighted average grant date fair value (in dollars per share)	$ 2.80
Granted (in shares)	147,750	132,100	114,450
Granted, weighted average grant date fair value (in dollars per share)	$ 2.78
Vested (in shares)	(60,400)
Vested, weighted average grant date fair value (in dollars per share)	$ 2.91
Terminated or expired (in shares)	(38,700)
Terminated or expired, weighted average grant date fair value (in dollars per share)	$ 2.86
Non-vested, balance (in shares)	257,025	208,375
Non-vested, balance, weighted average grant date fair value (in dollars per share)	$ 2.75	$ 2.80