Segment and Geographical Information - Segment Revenue, Operating (Loss) Income and Depreciation and Amortization (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting Information [Line Items]
Total revenue	$ 22,227	$ 17,790	$ 58,298	$ 53,054
Operating (loss) income	(6,250)	1,743	(6,359)	6,688
Depreciation and amortization	1,605	1,405	4,711	4,006
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating (loss) income	(4,017)	3,633	(82)	12,549
Operating Segments [Member] | Medical Device [Member]
Segment Reporting Information [Line Items]
Total revenue	16,701	12,778	43,527	39,260
Operating (loss) income	(6,193)	1,403	(6,351)	6,627
Depreciation and amortization	1,333	1,132	3,929	3,180
Operating Segments [Member] | In Vitro Diagnostics [Member]
Segment Reporting Information [Line Items]
Total revenue	5,526	5,012	14,771	13,794
Operating (loss) income	2,176	2,230	6,269	5,922
Depreciation and amortization	101	103	291	309
Corporate [Member]
Segment Reporting Information [Line Items]
Operating (loss) income	(2,233)	(1,890)	(6,277)	(5,861)
Depreciation and amortization	$ 171	$ 170	$ 491	$ 517