CONSOLIDATED STATEMENTS OF INCOME (LOSS) (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Income Statement [Abstract]
Revenue	$ 7,516	$ 8,550	$ 23,302	$ 24,592
Costs, expenses and other income:
Cost of goods sold, exclusive of depreciation and amortization	5,536	5,821	17,081	17,046
Selling, general and administrative	1,275	1,145	3,753	3,543
Interest expense	11	12	34	37
Depreciation and amortization	141	139	437	427
Other income, net	(2)	(150)	(12)	(164)
Total expenses	6,961	6,967	21,293	20,889
Income from continuing operations before income tax provision	555	1,583	2,009	3,703
Income tax provision	249	476	663	1,115
Income from continuing operations	306	1,107	1,346	2,588
Discontinued Operations:
Loss from operations of a discontinued component, net of income tax benefit	(188)	(203)	(591)	(550)
Loss on disposal of QCC and AMP, net of income tax benefit	(262)		(530)
Loss from discontinued operations	(450)	(203)	(1,121)	(550)
Net income (loss)	$ (144)	$ 904	$ 225	$ 2,038
Basic
Income per share from continuing operations (in dollars per share)	$ 0.14	$ 0.56	$ 0.63	$ 1.31
Loss per share from discontinued operations (in dollars per share)	$ (0.21)	$ (0.10)	$ (0.53)	$ (0.28)
Total net income (loss) per share (in dollars per share)	$ (0.07)	$ 0.46	$ 0.10	$ 1.03
Diluted
Income per share from continuing operations (in dollars per share)	$ 0.14	$ 0.53	$ 0.63	$ 1.23
Loss per share from discontinued operations (in dollars per share)	$ (0.21)	$ (0.10)	$ (0.52)	$ (0.26)
Total net income (loss) per share (in dollars per share)	$ (0.07)	$ 0.43	$ 0.11	$ 0.97