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Employee Retirement Plan and Deferred Compensation Plan - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified | 1 Months Ended | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Jan. 31, 2010 | Jun. 28, 2014 | Jun. 29, 2013 | Jun. 28, 2014 | Jun. 29, 2013 | Dec. 28, 2013
Postemployment Benefits [Abstract] |  |  |  |  |  |
Minimum service period required to cover under plan |  |  |  | 1 month |  |
Employee's salary subscription rate |  |  |  | 6.00% |  |
Contributions vest in annual installments |  |  |  | 3 years |  |
Discretionary contributions |  | $ 68 | $ 77 | $ 138 | $ 155 |
Defer up to under deferred compensation plan of base salary | 90.00% |  |  |  |  |
Defer up to under deferred compensation plan of annual earned bonus | 100.00% |  |  |  |  |
Deferred compensation plan vested | 100.00% |  |  |  |  |
Eligible contributions to deferred compensation plan | 50.00% |  |  |  |  |
Deferred compensation plan - company matching contribution percentage maximum (at fifty cents per dollar) | 2.00% |  |  |  |  |
Deferred compensation plan assets |  | 863 |  | 863 |  | 876
Deferred compensation plan associated liabilities |  | 717 |  | 717 |  | 838
Change in associated liabilities, Employee contribution |  | 34 | 43 | 34 | 43 |
Change in associated liabilities, Company contribution |  | 8 | 12 | 8 | 12 |
Net gain (loss) due to change in cash surrender value |  | $ (13) | $ (6) | $ (13) | $ 24 |

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