Reconciliation of Number of Common Shares Used in Calculation of Basic and Diluted Earnings Per Share (EPS) (Detail) - $ / shares	3 Months Ended
Mar. 31, 2016	Mar. 28, 2015
Earnings Per Share [Line Items]
Weighted average shares - Basic	16,609,084	17,335,464
Effect of dilutive securities, shares	29,374	176,357
Diluted EPS, shares	16,638,458	17,511,821
Basic EPS	$ 0.19	$ 0.04
Effect of dilutive securities	0	0
Diluted EPS	$ 0.19	$ 0.04

Earnings Per Share [Line Items]

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- Definition

Effect of dilutive securities, per share.

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- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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