SEGMENT REPORTING - Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Revenue
Revenue	$ 19,104	$ 19,916	$ 21,956	$ 21,583	$ 19,879	$ 21,062	$ 21,536	$ 20,253	$ 82,559	$ 82,730	$ 82,184
Earnings from operations
Earnings from operations									3,767	5,496	3,886
Capital expenditures
Capital expenditures									1,922	2,026	9,065
Depreciation and amortization
Depreciation and amortization									7,892	7,225	7,207
Surgical products
Revenue
Revenue									59,933	59,409	59,027
Earnings from operations
Earnings from operations									696	607	215
Capital expenditures
Capital expenditures									1,357	1,780	8,316
Depreciation and amortization
Depreciation and amortization									4,917	4,536	4,686
Brachytherapy Seed
Revenue
Revenue									23,597	24,077	23,752
Earnings from operations
Earnings from operations									3,122	4,923	3,685
Capital expenditures
Capital expenditures									565	246	749
Depreciation and amortization
Depreciation and amortization									2,975	2,689	2,521
Intersegment eliminations
Revenue
Revenue									(971)	(756)	(595)
Earnings from operations
Earnings from operations									$ (51)	$ (34)	$ (14)