Note 9 - Changes in the Company's Performance Stock Units (Details) - Performance Shares [Member]	6 Months Ended
	Aug. 27, 2016 $ / shares shares
Unvested restricted stock, beginning of period (in shares) | shares	627,000
Unvested restricted stock, beginning of period (in dollars per share) | $ / shares	$ 67.15
Granted (in shares) | shares	566,000
Granted (in dollars per share) | $ / shares	$ 45.53
Vested (in shares) | shares	(179,000)
Vested (in dollars per share) | $ / shares	$ 66.53
Forfeited (in shares) | shares	0
Forfeited (in dollars per share) | $ / shares	$ 0
Unvested restricted stock, end of period (in shares) | shares	1,014,000
Unvested restricted stock, end of period (in dollars per share) | $ / shares	$ 55.19