Stock-Based Awards - Stock Options Granted, Exercised and Outstanding (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Feb. 22, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Beginning Balance, Shares Under Option, Outstanding	22,246
Shares Under Option, Granted	10,083
Shares Under Option, Exercised	(3,121)
Shares Under Option, Canceled and forfeited	(5,873)
Ending Balance, Shares Under Option, Outstanding	23,335
Shares Under Option, Vested and expected to vest in the future	21,646
Shares Under Option, Exercisable	12,050
Beginning Balance, Weighted Average Exercise Price , Outstanding	$ 19.20
Weighted Average Exercise Price, Granted	$ 6.58
Weighted Average Exercise Price, Exercised	$ 2.29
Weighted Average Exercise Price, Canceled and forfeited	$ 23.70
Ending Balance, Weighted Average Exercise Price ,Outstanding	$ 14.87
Weighted Average Exercise Price, Vested and expected to vest in the future	$ 15.56
Weighted Average Exercise Price, Exercisable	$ 23.38
Weighted Average Remaining Contractual Term, Outstanding	5 years 4 months 28 days
Weighted Average Remaining Contractual Term, Vested and expected to vest in the future	5 years 1 month 13 days
Weighted Average Remaining Contractual Term, Exercisable	2 years 18 days
Aggregate Intrinsic Value, Outstanding	$ 15,982
Aggregate Intrinsic Value, Vested and expected to vest in the future	15,101
Aggregate Intrinsic Value, Exercisable	$ 7,340