CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Net Sales	$ 82,646	$ 63,028
Costs and expenses:
Cost of sales	68,576	53,932
Selling, general and administrative	11,189	10,399
Restructuring charge	0	124
Total costs and expenses	79,765	64,455
Income (loss) from operations	2,881	(1,427)
Interest expense	(30)	(3)
Interest income and other, net	51	38
Earnings (loss) before provision (benefit) for income taxes	2,902	(1,392)
Provision (benefit) for income taxes	399	(834)
Net earnings (loss)	2,503	(558)
Class A [Member]
Costs and expenses:
Net earnings (loss)	442	(112)
Earnings (loss) per share:
Common share - basic and diluted (in dollars per share)	$ 0.20	$ (0.05)
Weighted-average shares outstanding:
Common share - basic and diluted (in shares)	2,174,912	2,174,912
Dividends paid per share:
Common share (in dollars per share)	$ 0.06	$ 0.06
Class B [Member]
Costs and expenses:
Net earnings (loss)	$ 2,061	$ (446)
Earnings (loss) per share:
Common share - basic and diluted (in dollars per share)	$ 0.22	$ (0.05)
Weighted-average shares outstanding:
Common share - basic and diluted (in shares)	9,334,955	9,221,104
Dividends paid per share:
Common share (in dollars per share)	$ 0.07	$ 0.07