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 $)
Share data in Thousands, except Per Share data, unless otherwise specified
 9 Months Ended
Sep. 28, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Options outstanding, Shares, Beginning 7,428
Granted - Shares 1,253
Exercised - Shares (17)
Cancelled:  
Forfeited - Shares (105)
Expired - Shares (299)
Stock option exchange - Shares (3,475)
Options outstanding, Shares, Ending 4,785
Vested and expected to vest, Shares, Ending balance 4,184
Options exercisable, Shares, Ending balance 3,204
Options Outstanding, Weighted Average Exercise Price, Beginning Balance $ 5.13
Granted - Weighted Average Exercise Price $ 1.02
Exercised - Weighted Average Exercise Price $ 1.31
Forfeited - Weighted Average Exercise Price $ 4.75
Expired - Weighted Average Exercise Price $ 4.42
Stock option exchange - Weighted Average Exercise Price $ 6.65
Options Outstanding, Weighted Average Exercise Price, Ending Balance $ 3.01
Vested and expected to vest, Weighted Average Exercise Price, Ending Balance $ 3.26
Options exercisable, Weighted Average Exercise Price, Ending Balance $ 3.68
Options Outstanding, Weighted Average Remaining Contractual Term (in years), Beginning 6 years 2 months 23 days
Options Outstanding, Weighted Average Remaining Contractual Term (in years), Ending 6 years 6 months 22 days
Vested and expected to vest, Weighted Average Remaining Contractual Term (in years), Ending 6 years 1 month 2 days
Options exercisable, Weighted Average Remaining Contractual Term (in years), Ending 5 years 15 days
Options outstanding, Aggregate Intrinsic Value, Ending Balance $ 328
Vested and expected to vest, Aggregate Intrinsic Value, Ending Balance 186
Options exercisable, Aggregate Intrinsic Value, Ending Balance