STOCKHOLDERS' EQUITY. (Details 2) (USD $)	12 Months Ended
Dec. 27, 2014	Dec. 28, 2013
Outstanding
Number Outstanding (in shares)	351,808
Weighted-Average Remaining Contractual Life	1 year 8 months 16 days
Weighted-Average Exercise Price (in dollars per share)	$ 2.61
Exercisable
Number Exercisable (in shares)	351,808
Weighted-Average Exercise Price (in dollars per share)	$ 2.61
Intrinsic value of outstanding exercisable options	$ 1,777,415	$ 1,510,029
Exercise Price Dollars5.46 [Member]
Exercise price
Range of Exercise prices, low end of range (in dollars per share)	$ 5.46
Outstanding
Number Outstanding (in shares)	6,811
Weighted-Average Remaining Contractual Life	18 days
Weighted-Average Exercise Price (in dollars per share)	$ 5.46
Exercisable
Number Exercisable (in shares)	6,811
Weighted-Average Exercise Price (in dollars per share)	$ 5.46
Exercise Price Range From Dollars4.62 To Dollars5.09 [Member]
Outstanding
Number Outstanding (in shares)	79,596
Weighted-Average Remaining Contractual Life	4 months 10 days
Weighted-Average Exercise Price (in dollars per share)	$ 4.83
Exercisable
Number Exercisable (in shares)	79,596
Weighted-Average Exercise Price (in dollars per share)	$ 4.83
Exercise Price Dollars1.35 [Member]
Exercise price
Range of Exercise prices, low end of range (in dollars per share)	$ 1.35
Outstanding
Number Outstanding (in shares)	21,066
Weighted-Average Remaining Contractual Life	9 months 29 days
Weighted-Average Exercise Price (in dollars per share)	$ 1.35
Exercisable
Number Exercisable (in shares)	21,066
Weighted-Average Exercise Price (in dollars per share)	$ 1.35
Exercise Price Range From Dollars1.48 To Dollars1.63 [Member]
Outstanding
Number Outstanding (in shares)	93,450
Weighted-Average Remaining Contractual Life	1 year 6 months
Weighted-Average Exercise Price (in dollars per share)	$ 1.50
Exercisable
Number Exercisable (in shares)	93,450
Weighted-Average Exercise Price (in dollars per share)	$ 1.50
Exercise Price Range From Dollars2.12 To Dollars2.33 [Member]
Outstanding
Number Outstanding (in shares)	150,885
Weighted-Average Remaining Contractual Life	2 years 9 months 4 days
Weighted-Average Exercise Price (in dollars per share)	$ 2.17
Exercisable
Number Exercisable (in shares)	150,885
Weighted-Average Exercise Price (in dollars per share)	$ 2.17

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- Definition

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.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 10

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Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

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

-Publisher FASB

-Name Accounting Standards Codification

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The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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

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The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

+ References

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

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The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

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The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

+ References

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

-Publisher FASB

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- Definition

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

+ References

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

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