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Stock-Based Compensation Expense (Detail) (USD $)
|
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
|
Sep. 29, 2012
|
Sep. 24, 2011
|
Sep. 29, 2012
|
Sep. 24, 2011
|
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| Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | ||||
| Stock-based compensation expense | $ 43,670 | $ 39,506 | $ 142,454 | $ 151,576 |