Operating Segments - Segment Revenue, Operating Income and Depreciation and Amortization (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Segment Reporting Information [Line Items]
Total revenue	$ 14,616	$ 14,289	$ 42,103	$ 41,835
Operating income	5,333	4,238	13,142	13,244
Depreciation and amortization	674	728	2,054	2,174
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating income	6,829	6,138	18,743	18,781
Operating Segments [Member] | Medical Device [Member]
Segment Reporting Information [Line Items]
Total revenue	10,821	10,591	31,852	30,857
Operating income	5,855	5,223	16,466	15,848
Depreciation and amortization	281	319	862	947
Operating Segments [Member] | In Vitro Diagnostics [Member]
Segment Reporting Information [Line Items]
Total revenue	3,795	3,698	10,251	10,978
Operating income	974	915	2,277	2,933
Depreciation and amortization	214	216	641	649
Corporate [Member]
Segment Reporting Information [Line Items]
Operating income	(1,496)	(1,900)	(5,601)	(5,537)
Depreciation and amortization	$ 179	$ 193	$ 551	$ 578