Note 5 - Stock-based Compensation - Non-vested Options (Details) - $ / shares	12 Months Ended
	Feb. 26, 2017	Feb. 28, 2016	Mar. 01, 2015
Non-vested, beginning of year (in shares)	504,867
Non-vested, beginning of year (in dollars per share)	$ 8.27
Granted (in shares)	1,250	379,450	18,000
Granted (in dollars per share)	$ 3.15	$ 5.30	$ 8.05
Vested (in shares)	(136,505)
Vested (in dollars per share)	$ 6.44
Terminated or expired (in shares)	(61,300)
Terminated or expired (in dollars per share)	$ 7.84
Non-vested, end of year (in shares)	308,312	504,867
Non-vested, end of year (in dollars per share)	$ 6.09	$ 8.27