Discontinued Operations (Details) (USD $)	12 Months Ended	1 Months Ended
	Dec. 31, 2011	Feb. 28, 2011 TMR business	Mar. 31, 2011 TMR business	Feb. 02, 2011 TMR business
Discontinued Operations
Purchase price in cash			$ 1,000,000	$ 1,000,000
Company's obligations under service contracts assumed			614,000	614,000
Total carrying value of the assets sold				385,000
Transaction costs		50,000
Gain on sale of discontinued operations before income taxes		1,179,000
Revenues:
Product sales	455,000
Service fees	68,000
Total	523,000
Income from discontinued operations	$ 53,000