STOCK-BASED COMPENSATION (Details) (Stock options, USD $)	3 Months Ended
Mar. 30, 2013
Stock options
Number of Shares
Outstanding at the beginning of the period (in shares)	959,808
Exercised (in shares)	(52,334)
Forfeited (in shares)	(19,478)
Outstanding at the end of the period (in shares)	887,996
Weighted-Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)	$ 3.93
Exercised (in dollars per share)	$ 2.09
Forfeited (in dollars per share)	$ 4.69
Outstanding at the end of the period (in dollars per share)	$ 4.03
Stock-based compensation, additional disclosure
Intrinsic value of outstanding exercisable options	$ 988,839
Weighted-average remaining contractual life of options exercisable	2 years 3 months
Total unrecognized compensation expense	$ 290,052
Recognition of unrecognized compensation expense over weighted average contractual life	2 years 4 months 6 days

As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Number of share options (or share units) exercised during the current period.

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