DISCONTINUED OPERATIONS (Details) (USD $)	12 Months Ended			3 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Jun. 30, 2011 Non-Coblation spine products	Dec. 31, 2011 Non-Coblation spine products
Discontinued operations
Cash proceeds from sale of assets				$ 5,500,000
Gain on sale of assets, after tax				1,300,000
Revenues, income (loss) and income taxes related to discontinued operations
Revenue					2,271,000
Gain on sale of assets				2,200,000	2,177,000
Income from discontinued operations before income taxes			3,084,000		3,084,000
Income tax provision			1,173,000		1,173,000
Income from discontinued operations	$ 0	$ 0	$ 1,911,000		$ 1,911,000