INCOME TAXES. (Details) (USD $)	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Federal:
Current	$ 1,439,346	$ 665,615	$ (91,975)
Deferred	1,253,385	372,886
Federal income tax expense (benefit)	2,692,731	1,038,501	(91,975)
State:
Current	360,800	(150,354)	(309,025)
Deferred	(194,216)	(1,198,337)
State income tax expense (benefit)	166,584	(1,348,691)	(309,025)
Total	2,859,315	(310,190)	(401,000)
Deferred tax assets:
Receivables	20,020	38,500
Inventories	937,161	1,544,285
Accrued liabilities	1,687,924	1,560,629
State net operating losses and credit carryforwards	1,615,046	1,269,848
Other	186,864	170,050
Total deferred tax assets	4,447,015	4,583,312
Deferred tax liabilities:
Depreciation	(3,862,862)	(2,919,247)
Prepaids and other	(817,871)	(838,614)
Total deferred tax liabilities	(4,680,733)	(3,757,861)
Net deferred tax assets (liabilities)	(233,718)	825,451
State
Tax loss carryforwards
Tax loss carryforwards	$ 21,000,000