Note 5 - Stock-based Compensation - Option Activity (Details) - $ / shares	12 Months Ended
	Feb. 26, 2017	Feb. 28, 2016	Mar. 01, 2015
Outstanding options (in shares)	1,226,392	966,692	1,081,117
Balance, weighted average exercise price (in dollars per share)	$ 21.19	$ 22.55	$ 23.84
Outstanding options, granted (in shares)	1,250	379,450	18,000
Granted, weighted average exercise price (in dollars per share)	$ 14.07	$ 17.82	$ 25.81
Outstanding options, exercised (in shares)		(2,500)	(79,800)
Exercised, weighted average exercise price (in dollars per share)		$ 19.91	$ 21.49
Outstanding options, terminated or expired (in shares)	(157,113)	(117,250)	(52,625)
Terminated or expired, weighted average exercise price (in dollars per share)	$ 21.66	$ 21.53	$ 24.21
Outstanding options (in shares)	1,070,529	1,226,392	966,692
Balance, weighted average exercise price (in dollars per share)	$ 21.08	$ 21.19	$ 22.55
Balance, weighted average remaining contractual term (Year)	5 years 189 days
Outstanding options, vested and exercisable (in shares)	762,217
Vested and exercisable, weighted average exercise price (in dollars per share)	$ 22.07
Vested and exercisable, weighted average remaining contractual term (Year)	4 years 146 days
Outstanding options, expected to vest (in shares)	1,009,509
Expected to vest, weighted average exercise price (in dollars per share)	$ 21.08
Expected to vest, weighted average remaining contractual term (Year)	5 years 189 days
Option Exchange Program [Member]
Outstanding options, granted (in shares)			996,892
Granted, weighted average exercise price (in dollars per share)			$ 22.55
Outstanding options, terminated or expired (in shares)			(996,892)
Terminated or expired, weighted average exercise price (in dollars per share)			$ 24.05