Note 5 - Stock-based Compensation - Non-vested Options (Details) - $ / shares	12 Months Ended
	Feb. 25, 2018	Feb. 26, 2017	Feb. 28, 2016
Non-vested, beginning of year (in shares)	308,312
Non-vested, beginning of year (in dollars per share)	$ 6.09
Granted (in shares)		1,250	379,450
Granted (in dollars per share)		$ 3.15	$ 5.30
Vested (in shares)	(93,112)
Vested (in dollars per share)	$ 5.17
Terminated or expired (in shares)	(18,962)
Terminated or expired (in dollars per share)	$ 6.13
Non-vested, end of year (in shares)	196,238	308,312
Non-vested, end of year (in dollars per share)	$ 6.09	$ 6.09