Goodwill - Schedule Of Carrying Amount of Goodwill by Segment (Detail) $ in Thousands	6 Months Ended
	Mar. 31, 2018 USD ($)
Goodwill [Line Items]
Balance as of September 30, 2017	$ 27,282
Currency translation adjustment	651
Balance as of March 31, 2018	27,933
In Vitro Diagnostics [Member]
Goodwill [Line Items]
Balance as of September 30, 2017	8,010
Balance as of March 31, 2018	8,010
Medical Device [Member]
Goodwill [Line Items]
Balance as of September 30, 2017	19,272
Currency translation adjustment	651
Balance as of March 31, 2018	$ 19,923