STOCK-BASED COMPENSATION. (Details 3) (USD $)	6 Months Ended
	Jun. 28, 2014
Restricted Stock [Member]
Number of Shares
Unvested at the beginning of the period (in shares)	110,431
Granted (in shares)	60,896
Vested (in shares)	(31,063)
Unvested at the end of the period (in shares)	140,264
Weighted - Average Grant Date Fair Value
Unvested at the beginning of the period (in dollars per share)	$ 3.99
Granted (in dollars per share)	$ 4.83
Vested (in dollars per share)	$ 4.25
Unvested at the end of the period (in dollars per share)	$ 5.10
Total fair value of shares vested and recognized as stock-based compensation expense during the year	$ 143,142
Stock-based compensation, additional disclosure
Granted (in shares)	60,896
Employee And Nonemployee Stock Option [Member]
Options
Outstanding at the beginning of the period (in shares)	535,431
Exercised (in shares)	(151,504)
Outstanding at the end of the period (in shares)	383,927
Weighted - Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)	$ 2.79
Exercised (in dollars per share)	$ 3.43
Outstanding at the end of the period (in dollars per share)	$ 2.54
Stock-based compensation, additional disclosure
Intrinsic value of outstanding exercisable options	1,480,722
Weighted-average remaining contractual life of options exercisable	2 years 2 months 12 days
Total unrecognized compensation expense	716,031
Recognition of unrecognized compensation expense over weighted average contractual life	2 years 2 months 12 days
Director [Member]
Number of Shares
Granted (in shares)	12,432
Stock-based compensation, additional disclosure
Stock award paid as compensation to outside directors	27,500
Granted (in shares)	12,432
Stock-based compensation expense	$ 82,500