Operating Segments - Segment Revenue, Operating Income from Continuing Operations and Depreciation and Amortization (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Segment Reporting Information [Line Items]
Total revenue	$ 14,289	$ 13,959	$ 41,835	$ 38,085
Operating income from continuing operations	4,238	4,793	13,244	11,704
Depreciation and amortization	728	734	2,174	2,214
Medical Device [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	319	355	947	1,073
In Vitro Diagnostics [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	216	193	649	582
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating income from continuing operations	6,138	6,243	18,781	16,472
Operating Segments [Member] | Medical Device [Member]
Segment Reporting Information [Line Items]
Total revenue	10,591	10,269	30,857	27,889
Operating income from continuing operations	5,223	5,173	15,848	13,226
Operating Segments [Member] | In Vitro Diagnostics [Member]
Segment Reporting Information [Line Items]
Total revenue	3,698	3,690	10,978	10,196
Operating income from continuing operations	915	1,070	2,933	3,246
Corporate [Member]
Segment Reporting Information [Line Items]
Operating income from continuing operations	(1,900)	(1,450)	(5,537)	(4,768)
Depreciation and amortization	$ 193	$ 186	$ 578	$ 559