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Stockholders' Equity and Share-Based Compensation - Additional Information 3 (Detail) (USD $)
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0 Months Ended | 1 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 1 Months Ended | 9 Months Ended | ||||||||
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May 05, 2009
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Sep. 10, 2013
Employees
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Apr. 27, 2010
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Sep. 28, 2013
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Mar. 30, 2013
Warrants [Member]
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Jun. 30, 2012
Warrants [Member]
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Mar. 31, 2012
Warrants [Member]
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Sep. 28, 2013
Warrants [Member]
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Sep. 29, 2012
Warrants [Member]
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Apr. 27, 2010
Warrants [Member]
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May 05, 2009
Warrants [Member]
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Jul. 09, 2013
Stock Option Exchange Program [Member]
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Sep. 28, 2013
Stock Option Exchange Program [Member]
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Sep. 28, 2013
Stock Option Exchange Program [Member]
Stock Options Vest One Year [Member]
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Sep. 28, 2013
Stock Option Exchange Program [Member]
Vest After One Year [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||||||||||||
| Exercise price of shares issued under exchange program | $ 1.31 | $ 4 | |||||||||||||
| option exchange ratio | 3.5 to 1 ratio | ||||||||||||||
| Shares issued under exchange program | 3,733,000 | ||||||||||||||
| Stock option exercise price, Minimum | $ 4.01 | ||||||||||||||
| Stock option exercise price, Maximum | $ 11.68 | ||||||||||||||
| Stock options vesting period | 4 years | ||||||||||||||
| Stock options vesting, description | The terms and conditions of the new options are subject to an entirely new four year vesting schedule where 25% will vest on the first anniversary, and the remaining 75% will vest monthly over the following 36 months. All new options have a ten year contractual term. | ||||||||||||||
| Stock options vested, Percentage | 25.00% | 75.00% | |||||||||||||
| Stock options vesting period maximum | 10 years | ||||||||||||||
| Stock options exercisable, number | 3,475,000 | ||||||||||||||
| Stock options exercised, Weighted average exercise price | $ 6.65 | ||||||||||||||
| Eligible employees | 45 | ||||||||||||||
| Option unvested exercisable number | 993,000 | 993,000 | |||||||||||||
| Option Nonvested Exercisable weighted average price | $ 0.9866 | ||||||||||||||
| Incremental fair value on the date of exchange | $ 422 | ||||||||||||||
| Vesting period of the new options | 4 years | ||||||||||||||
| Common stock warrants issued during period | 20,000 | 30,000 | |||||||||||||
| Warrant exercise price for warrants issued during period | 8.32 | 2.14 | |||||||||||||
| Termination period of warrants after grant date | 7 years | 7 years | |||||||||||||
| Warrants vest in equal monthly increments | 36 months | 24 months | |||||||||||||
| Increment of shares in warrant vest | 830 | 830 | |||||||||||||
| Grant date fair value of warrants issued during period | $ 2.12 | $ 1.09 | |||||||||||||
| Re-measured fair value of warrants | $ 3.14 | $ 1.42 | |||||||||||||
| Warrants exercised during period | 0 | ||||||||||||||
| Outstanding common stock warrants | 50,000 | ||||||||||||||
| Aggregate intrinsic value of outstanding and exercisable warrants | 0 | ||||||||||||||
| Share-based compensation expense recognized related to warrants | 0 | 16,000 | |||||||||||||
| Unrecognized share-based compensation expense related to warrants outstanding | $ 0 | ||||||||||||||