CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND RETAINED EARNINGS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 29, 2014	Mar. 30, 2013
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND RETAINED EARNINGS
Net sales	$ 26,824	$ 26,213
Costs and expenses:
Cost of sales (exclusive of depreciation, depletion and amortization)	22,725	21,620
Depreciation, depletion and amortization	738	815
Selling and administrative	5,046	4,863
Williams EcoLogix project expenses		48
Total costs and expenses	28,509	27,346
Operating loss	(1,685)	(1,133)
Interest expense, net	(99)	(87)
Other (loss) income, net	(5)	13
Loss before income taxes	(1,789)	(1,207)
Benefit from income taxes	608	404
Net loss	(1,181)	(803)
Retained earnings, beginning of period	65,529	66,388
Retained earnings, end of period	$ 64,348	$ 65,585
Basic and diluted loss per share (in dollars per share)	$ (0.72)	$ (0.49)
Average shares outstanding (in shares)	1,645	1,641