CONSOLIDATED STATEMENTS OF INCOME (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Income Statement [Abstract]
Revenue	$ 7,856	$ 8,147	$ 16,007	$ 16,191
Costs, expenses and other income:
Cost of goods sold, exclusive of depreciation and amortization	5,534	5,698	11,991	11,619
Selling, general and administrative	1,272	1,230	2,573	2,494
Interest expense	14	15	27	30
Depreciation and amortization	169	166	340	331
Other income, net	(2)	(4)	(10)	(14)
Total expenses	6,987	7,105	14,921	14,460
Income from continuing operations before income tax provision	869	1,042	1,086	1,731
Income tax provision	247	313	309	520
Income from continuing operations	622	729	777	1,211
Discontinued Operations:
Loss from operations of a discontinued component, net of income tax benefit	(74)	(13)	(160)	(77)
Write-down of assets associated with a discontinued component, net of income tax benefit	(268)		(268)
Loss from discontinued operations	(342)	(13)	(428)	(77)
Net income	$ 280	$ 716	$ 349	$ 1,134
Basic
Income per share from continuing operations (in dollars per share)	$ 0.29	$ 0.37	$ 0.37	$ 0.61
Loss per share from discontinued operations (in dollars per share)	$ (0.16)	$ (0.01)	$ (0.20)	$ (0.04)
Total net income per share (in dollars per share)	$ 0.13	$ 0.36	$ 0.17	$ 0.57
Diluted
Income per share from continuing operations (in dollars per share)	$ 0.29	$ 0.35	$ 0.36	$ 0.57
Loss per share from discontinued operations (in dollars per share)	$ (0.16)	$ (0.01)	$ (0.20)	$ (0.04)
Total net income per share (in dollars per share)	$ 0.13	$ 0.34	$ 0.16	$ 0.53