INCOME TAXES. (Details 2) (USD $)	12 Months Ended
Dec. 29, 2012	Dec. 31, 2011	Dec. 25, 2010
INCOME TAXES.
Statutory federal income tax rate (as a percent)	35.00%	34.00%	34.00%
Reconciliation of the provision for income taxes
Income taxes at the federal statutory rate	$ 4,032,979	$ 97,219	$ (2,758,079)
State income taxes, net of federal tax effect	337,042	60,704	(227,236)
Tax-exempt underwriting income of wholly-owned small captive insurance subsidiary			(404,600)
Domestic production deduction	(304,300)
Research and development tax credits		(147,617)	(280,153)
Alternative fuel tax credit		(87,166)	(25,000)
Stock-based compensation	30,577	(35,685)	150,668
Change in valuation allowance	(4,589,176)	(359,713)	3,833,625
Other, net	182,688	71,258	210,400
Total	(310,190)	(401,000)	499,625
Reconciliation of the change in the unrecognized tax benefits
Unrecognized tax benefits at the beginning of the period	719,612	1,040,054	1,005,258
Lapse of statute of limitations	(222,430)	(401,000)
Gross increases - tax positions in prior periods	22,430	80,558	34,796
Unrecognized tax benefits at the end of the period	519,612	719,612	1,040,054
Unrecognized tax benefits, if recognized, would effect annual effective tax rate	$ 519,612

Represents the portion of the difference between total income tax expense or benefit as reported in the Income Statement and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to alternative fuel tax credits generated or utilized under enacted tax laws during the period.

No definition available.