Stock-Based Compensation - Summary of Option Activity Under Plans (Detail) (USD $) In Millions, except Share data, unless otherwise specified	6 Months Ended	12 Months Ended
	Dec. 28, 2014	Jun. 29, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options outstanding at June 29, 2014	2,811,919
Options granted	255,505
Options exercised	(11,887)
Options expired	(575,242)
Options forfeited	(37,495)
Options outstanding at December 28, 2014	2,442,800	2,811,919
Options vested and expected to vest at December 28, 2014	2,363,499
Options exercisable at December 28, 2014	1,637,506
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Options outstanding, Weighted Average Exercise Price at June 29, 2014	$ 9.95
Options granted, Weighted Average Exercise Price	$ 5.18
Options exercised, Weighted Average Exercise Price	$ 1.92
Options expired, Weighted Average Exercise Price	$ 13.09
Options forfeited, Weighted Average Exercise Price	$ 6.89
Options outstanding, Weighted Average Exercise Price at September 28, 2014	$ 8.80	$ 9.95
Options vested and expected to vest, Weighted Average Exercise Price at September 28, 2014	$ 8.91
Options exercisable, Weighted Average Exercise Price at September 28, 2014	$ 10.25
Share-based Compensation Arrangement by Share-based Payment Award, Options, Weighted Average Remaining Contractual Term [Roll Forward]
Options outstanding, Weighted Average Remaining Contractual Term	2 years 10 months 15 days	2 years 5 months 19 days
Options vested and expected to vest, Weighted Average Remaining Contractual Term	2 years 9 months 10 days
Options exercisable, Weighted Average Remaining Contractual Term	1 year 7 months 28 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Options outstanding, Aggregate Intrinsic Value at June 29, 2014	$ 0.2
Options outstanding, Aggregate Intrinsic Value at September 28, 2014	0.5	0.2
Options vested and expected to vest, Aggregate Intrinsic Value at September 28, 2014	0.4
Options exercisable, Aggregate Intrinsic Value at September 28, 2014	$ 0.2