Operating Segment Information - Segment Revenue, Operating Income and Depreciation and Amortization (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Segment Reporting Information [Line Items]
Total revenue	$ 15,914	$ 14,616	$ 44,535	$ 42,103
Operating income	5,857	5,333	14,824	13,142
Depreciation and amortization	694	674	2,083	2,054
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating income	7,486	6,829	19,727	18,743
Operating Segments [Member] | Medical Device [Member]
Segment Reporting Information [Line Items]
Total revenue	11,629	10,821	32,827	31,852
Operating income	6,295	5,855	16,507	16,466
Depreciation and amortization	288	281	852	862
Operating Segments [Member] | In Vitro Diagnostics [Member]
Segment Reporting Information [Line Items]
Total revenue	4,285	3,795	11,708	10,251
Operating income	1,191	974	3,220	2,277
Depreciation and amortization	215	214	645	641
Corporate [Member]
Segment Reporting Information [Line Items]
Operating income	(1,629)	(1,496)	(4,903)	(5,601)
Depreciation and amortization	$ 191	$ 179	$ 586	$ 551