Operating Segments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Schedule of segment revenue operating income from continuing operations and depreciation and amortization
Total revenue	$ 13,843	$ 13,959	$ 12,210	$ 11,916	$ 13,901	$ 12,999	$ 13,334	$ 12,522	$ 51,928	$ 52,756	$ 54,488
Operating income (loss)	4,638	4,793	3,689	3,222	2,933	4,257	4,212	4,121	16,342	15,523	11,991
Depreciation and amortization									2,929	3,159	3,620
Medical Device [Member]
Schedule of segment revenue operating income from continuing operations and depreciation and amortization
Total revenue									37,883	39,606	43,294
Operating income (loss)									18,431	19,997	19,461
Depreciation and amortization									1,414	1,604	2,136
In Vitro Diagnostics [Member]
Schedule of segment revenue operating income from continuing operations and depreciation and amortization
Total revenue									14,045	13,150	11,194
Operating income (loss)									4,542	4,314	3,296
Depreciation and amortization									774	799	828
Corporate [Member]
Schedule of segment revenue operating income from continuing operations and depreciation and amortization
Operating income (loss)									(6,631)	(8,788)	(10,766)
Depreciation and amortization									$ 741	$ 756	$ 656