Consolidated Statements of Income (USD $) In Thousands, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Income Statement [Abstract]
Revenue	$ 8,808	$ 7,346	$ 25,496	$ 23,433
Costs, expenses and other income:
Cost of goods sold, exclusive of depreciation and amortization	6,284	5,643	18,447	16,839
Selling, general and administrative	1,204	1,225	3,757	3,682
Interest expense	14	16	44	50
Depreciation and amortization	163	159	498	483
Other income, net	(150)	(6)	(164)	(29)
Total Costs	7,515	7,037	22,582	21,025
Income before income tax provision	1,293	309	2,914	2,408
Income tax provision	389	104	876	802
Net income	$ 904	$ 205	$ 2,038	$ 1,606
Basic
Net income per share	$ 0.46	$ 0.10	$ 1.03	$ 0.82
Diluted
Net income per share	$ 0.44	$ 0.10	$ 0.97	$ 0.75