Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity and Share-Based Compensation - Summary of Stock Option Activity (Detail)

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Stockholders' Equity and Share-Based Compensation - Summary of Stock Option Activity (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended
Mar. 29, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Options outstanding, Shares, Beginning 5,320
Options granted, Shares 650
Exercised, Shares (35)
Expired, Shares (17)
Forfeited, Shares (94)
Options outstanding, Shares, Ending 5,823
Vested and expected to vest, Shares, Ending balance 4,890
Options exercisable, Shares, Ending balance 3,157
Options outstanding, Weighted Average Exercise Price, Beginning Balance $ 2.97
Options granted - Weighted Average Exercise Price $ 2.03
Exercised - Weighted Average Exercise Price $ 2.12
Expired - Weighted Average Exercise Price $ 3.89
Forfeited - Weighted Average Exercise Price $ 1.74
Options outstanding, Weighted Average Exercise Price, Ending Balance $ 2.88
Vested and expected to vest, Weighted Average Exercise Price, Ending Balance $ 3.10
Options exercisable, Weighted Average Exercise Price, Ending Balance $ 3.77
Options outstanding, Weighted Average Remaining Contractual Term (in years), Ending 6 years 9 months 29 days
Vested and expected to vest, Weighted Average Remaining Contractual Term (in years), Ending 6 years 3 months 18 days
Options exercisable, Weighted Average Remaining Contractual Term (in years), Ending 4 years 7 months 2 days
Options outstanding, Aggregate Intrinsic Value, Ending Balance $ 4,792
Vested and expected to vest, Aggregate Intrinsic Value, Ending Balance 3,648
Options exercisable, Aggregate Intrinsic Value, Ending Balance $ 1,552