Sale of TMR Business to Novadaq/Discontinued Operations (Details) (USD $)	6 Months Ended	1 Months Ended
	Jun. 30, 2011	Feb. 28, 2011 TMR business	Feb. 02, 2011 TMR business
Sale of TMR Business to Novadaq/Discontinued Operations
Purchase price in cash			$ 1,000,000
Company's obligations under service contracts assumed			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