CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND RETAINED EARNINGS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 30, 2013	Mar. 31, 2012
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND RETAINED EARNINGS
Net sales	$ 26,213	$ 24,396
Costs and expenses:
Cost of sales (exclusive of depreciation, depletion and amortization)	21,620	19,573
Depreciation, depletion and amortization	815	1,068
Selling and administrative	4,911	5,291
Gain on disposition of property and equipment		2
Total costs and expenses	27,346	25,930
Operating loss	(1,133)	(1,534)
Interest expense, net	(87)	(134)
Amortization of deferred financing fees		(51)
Other income, net	13	10
Loss before income taxes	(1,207)	(1,709)
Benefit from income taxes	404	656
Net loss	(803)	(1,053)
Retained earnings, beginning of period	66,388	62,999
Retained earnings, end of period	$ 65,585	$ 61,946
Basic and diluted loss per share: (in dollars per share)	$ (0.49)	$ (0.64)
Average shares outstanding (in shares)	1,641	1,634