SELECTED QUARTERLY FINANCIAL INFORMATION (UNAUDITED) (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Oct. 01, 2016	Jul. 02, 2016	Apr. 02, 2016	Jan. 02, 2016	Oct. 03, 2015	Jul. 04, 2015	Apr. 04, 2015	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
SELECTED QUARTERLY FINANCIAL INFORMATION (UNAUDITED) [Abstract]
Net sales	$ 34,144,942	$ 33,478,347	$ 36,883,312	$ 33,101,657	$ 34,413,912	$ 36,239,500	$ 37,037,697	$ 36,876,842	$ 137,608,258	$ 144,567,951	$ 140,825,360
Gross margin	10,417,944	8,852,878	8,601,603	6,420,446	8,100,044	9,033,843	7,912,161	7,335,178	34,292,871	32,381,226	32,486,404
Selling and administrative expenses	6,612,918	5,588,764	5,495,735	5,459,582	5,749,422	5,584,222	7,056,139	5,963,695	23,156,999	24,353,498	20,767,756
Net (loss)/income	$ 2,649,349	$ 2,400,064	$ 2,087,837	$ 648,073	$ 1,740,776	$ 2,527,722	$ 584,594	$ 873,951	$ 7,785,323	$ 5,727,043	$ 7,661,476
Net (loss)/income per share [Abstract]
Basic (in dollars per share)	$ 0.42	$ 0.38	$ 0.33	$ 0.10	$ 0.28	$ 0.41	$ 0.09	$ 0.14	$ 1.25	$ 0.92	$ 1.23
Diluted (in dollars per share)	$ 0.42	$ 0.38	$ 0.33	$ 0.10	$ 0.28	$ 0.41	$ 0.09	$ 0.14	$ 1.25	$ 0.92	$ 1.23
Weighted average shares outstanding [Abstract]
Basic (in shares)	6,254,605	6,252,681	6,250,610	6,248,222	6,246,571	6,245,099	6,244,051	6,244,088	6,251,535	6,245,057	6,225,068
Diluted (in shares)	6,254,605	6,252,681	6,250,610	6,248,222	6,246,571	6,245,099	6,244,051	6,244,088	6,251,535	6,245,057	6,237,914