Operating Segments - Segment Revenue, Operating Income and Depreciation and Amortization (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Total revenue	$ 13,883	$ 13,851
Operating income	4,329	4,877
Depreciation and amortization	697	722
Medical Device [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	294	317
In Vitro Diagnostics [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	214	215
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating income	5,999	6,591
Operating Segments [Member] | Medical Device [Member]
Segment Reporting Information [Line Items]
Total revenue	10,549	10,531
Operating income	5,328	5,840
Operating Segments [Member] | In Vitro Diagnostics [Member]
Segment Reporting Information [Line Items]
Total revenue	3,334	3,320
Operating income	671	751
Corporate [Member]
Segment Reporting Information [Line Items]
Operating income	(1,670)	(1,714)
Depreciation and amortization	$ 189	$ 190