Segment Revenue, Operating Income from Continuing Operations and Depreciation and Amortization (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]
Total revenue	$ 13,851	$ 11,916
Operating income from continuing operations	4,877	3,222
Depreciation and amortization	722	749
Medical Device
Segment Reporting Information [Line Items]
Total revenue	10,531	8,867
Operating income from continuing operations	5,840	3,932
Depreciation and amortization	317	364
In Vitro Diagnostics
Segment Reporting Information [Line Items]
Total revenue	3,320	3,049
Operating income from continuing operations	751	906
Depreciation and amortization	215	195
Corporate
Segment Reporting Information [Line Items]
Operating income from continuing operations	(1,714)	(1,616)
Depreciation and amortization	$ 190	$ 190