Segment and Geographical Information - Segment Revenue, Operating Income (Loss) and Depreciation and Amortization (Detail) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Total revenue	$ 22,241	$ 17,013
Operating income (loss)	712	(633)
Depreciation and amortization	1,756	1,520
Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenue	22,241	17,013
Operating income (loss)	2,812	1,281
Operating Segments [Member] | Medical Device [Member]
Segment Reporting Information [Line Items]
Total revenue	17,258	12,774
Operating income (loss)	357	(389)
Depreciation and amortization	1,388	1,272
Operating Segments [Member] | In Vitro Diagnostics [Member]
Segment Reporting Information [Line Items]
Total revenue	4,983	4,239
Operating income (loss)	2,455	1,670
Depreciation and amortization	116	90
Corporate [Member]
Segment Reporting Information [Line Items]
Operating income (loss)	(2,100)	(1,914)
Depreciation and amortization	$ 252	$ 158