Employee Stock Based Compensation - Summary of Information about Employee Stock Options Outstanding (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 28, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding	5,204,569
Outstanding Intrinsic Value	$ 41,776
Exercisable	2,970,640
Exercisable Intrinsic Value	24,077
Range One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise Price	$ 1.51
Remaining Contractual Life	1 month 6 days
Outstanding	391,167
Outstanding Intrinsic Value	3,325
Exercisable	391,167
Exercisable Intrinsic Value	3,325
Range Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise Price	$ 0.92
Remaining Contractual Life	2 years 1 month 6 days
Outstanding	117,063
Outstanding Intrinsic Value	1,064
Exercisable	117,063
Exercisable Intrinsic Value	1,064
Range Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise Price Range, Lower Range Limit	$ 1.60
Exercise Price Range, Upper Range Limit	$ 2.31
Remaining Contractual Life	6 years 2 months 12 days
Outstanding	4,346,339
Outstanding Intrinsic Value	34,809
Exercisable	2,403,076
Exercisable Intrinsic Value	19,252
Range Four [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise Price Range, Lower Range Limit	$ 2.59
Exercise Price Range, Upper Range Limit	$ 3.25
Remaining Contractual Life	8 years 4 months 24 days
Outstanding	350,000
Outstanding Intrinsic Value	2,578
Exercisable	59,334
Exercisable Intrinsic Value	$ 436