Goodwill - Schedule of Carrying Amount of Goodwill by Segment (Detail) $ in Thousands	6 Months Ended
	Mar. 31, 2019 USD ($)
Goodwill [Line Items]
Balance as of September 30, 2018	$ 27,032
Currency translation adjustment	(483)
Balance as of March 31, 2019	26,549
In Vitro Diagnostics [Member]
Goodwill [Line Items]
Balance as of September 30, 2018	8,010
Balance as of March 31, 2019	8,010
Medical Device [Member]
Goodwill [Line Items]
Balance as of September 30, 2018	19,022
Currency translation adjustment	(483)
Balance as of March 31, 2019	$ 18,539