Share Option Activity under Nineteen Ninety Nine Plan (Detail) (USD $)	12 Months Ended
	Jun. 29, 2012	Jun. 24, 2011	Jun. 25, 2010
Number of Shares Underlying Options
Granted	590,537	1,012,367	168,500
Exercised	(237,350)	(438,329)	(285,108)
Weighted-Average Exercise Price Per Share
Granted	$ 14.82
Exercised	$ 4.21	$ 3.59	$ 1.70
Stock Plan 1999
Number of Shares Underlying Options
Shares underlying options outstanding at beginning of the period	423,205	858,005	1,023,592
Granted			168,500
Exercised	(225,731)	(418,048)	(285,108)
Forfeited	(6,805)	(10,852)	(19,219)
Expired	(1,129)	(5,900)	(29,760)
Shares underlying options outstanding at end of the period	189,540	423,205	858,005
Shares underlying options exercisable at end of the period	133,578	292,514	593,409
Weighted-Average Exercise Price Per Share
Beginning Balance	$ 4.34	$ 3.66	$ 2.77
Granted			$ 5.77
Exercised	$ 3.58	$ 2.95	$ 1.70
Forfeited	$ 5.92	$ 5.48	$ 5.32
Expired	$ 5.75	$ 2.78	$ 2.67
Ending Balance	$ 5.18	$ 4.34	$ 3.66
Shares underlying options exercisable at end of the period	$ 4.94	$ 3.75	$ 2.93