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
 6 Months Ended
Jun. 28, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Options outstanding, Shares, Beginning 5,320
Granted, Shares 815
Exercised, Shares (109)
Expired, Shares (92)
Forfeited, Shares (98)
Options outstanding, Shares, Ending 5,836
Vested and expected to vest, Shares, Ending balance 4,991
Options exercisable, Shares, Ending balance 3,050
Options outstanding, Weighted Average Exercise Price, Beginning Balance $ 2.97
Granted - Weighted Average Exercise Price $ 2.29
Exercised - Weighted Average Exercise Price $ 2.00
Expired - Weighted Average Exercise Price $ 4.68
Forfeited - Weighted Average Exercise Price $ 1.72
Options outstanding, Weighted Average Exercise Price, Ending Balance $ 2.88
Vested and expected to vest, Weighted Average Exercise Price, Ending Balance $ 3.06
Options exercisable, Weighted Average Exercise Price, Ending Balance $ 3.79
Options outstanding, Weighted Average Remaining Contractual Term (in years), Ending 6 years 9 months 15 days
Vested and expected to vest, Weighted Average Remaining Contractual Term (in years), Ending 6 years 4 months 6 days
Options exercisable, Weighted Average Remaining Contractual Term (in years), Ending 4 years 6 months
Options outstanding, Aggregate Intrinsic Value, Ending Balance $ 7,681
Vested and expected to vest, Aggregate Intrinsic Value, Ending Balance 6,121
Options exercisable, Aggregate Intrinsic Value, Ending Balance $ 2,642