Note 6 - Stock-based Compensation - Option Activity (Details)	9 Months Ended
	Nov. 27, 2016 $ / shares shares
Balance (in shares) | shares	1,226,392
Balance (in dollars per share) | $ / shares	$ 22.51
Granted (in shares) | shares	1,250
Granted (in dollars per share) | $ / shares	$ 14.07
Exercised (in shares) | shares
Exercised (in dollars per share) | $ / shares
Terminated or expired (in shares) | shares	(150,314)
Terminated or expired (in dollars per share) | $ / shares	$ 21.76
Balance (in shares) | shares	1,077,328
Balance (in dollars per share) | $ / shares	$ 21.05
Vested and exercisable, November 27, 2016 (in shares) | shares	679,329
Vested and exercisable, November 27, 2016 (in dollars per share) | $ / shares	$ 22.42