Reportable Segment Information - Segment Revenue, Operating (Loss) Income and Depreciation and Amortization (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Segment Reporting Information [Line Items]
Total revenue	$ 22,543	$ 26,883	$ 22,822	$ 22,616	$ 30,816	$ 24,344	$ 22,676	$ 22,241	$ 94,864	$ 100,077	$ 81,336
Operating (loss) income	$ (1,993)	$ 1,164	$ (156)	$ (266)	$ 3,875	$ 1,017	$ 865	$ 712	(1,251)	6,469	(8,799)
Depreciation and amortization									7,263	7,312	6,431
Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenue									94,864	100,077	81,336
Operating (loss) income									8,525	15,414	141
Operating Segments [Member] | Medical Device [Member]
Segment Reporting Information [Line Items]
Total revenue									71,401	78,353	60,513
Operating (loss) income									(3,246)	4,794	(8,478)
Depreciation and amortization									6,223	5,811	5,376
Operating Segments [Member] | In Vitro Diagnostics [Member]
Segment Reporting Information [Line Items]
Total revenue									23,463	21,724	20,823
Operating (loss) income									11,771	10,620	8,619
Depreciation and amortization									483	464	394
Corporate [Member]
Segment Reporting Information [Line Items]
Operating (loss) income									(9,776)	(8,945)	(8,940)
Depreciation and amortization									$ 557	$ 1,037	$ 661