Summary of Significant Accounting Policies and Select Balance Sheet Information - Schedule Of Carrying Amount of Goodwill by Segment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Goodwill [Line Items]
Beginning Balance	$ 26,555	$ 8,010
Additions (See Note 3)		17,892
Foreign currency translation adjustment	727	653
Ending Balance	27,282	26,555
In Vitro Diagnostics [Member]
Goodwill [Line Items]
Beginning Balance	8,010	8,010
Ending Balance	8,010	8,010
Medical Device [Member]
Goodwill [Line Items]
Beginning Balance	18,545
Additions (See Note 3)		17,892
Foreign currency translation adjustment	727	653
Ending Balance	$ 19,272	$ 18,545