Restructuring - Schedule of Accrued Liability Associated With Restructuring Costs (Detail) - Diagnostics and Life Science Restructuring [Member] - USD ($) $ in Thousands	Dec. 31, 2018	Sep. 30, 2018
Restructuring Cost and Reserve [Line Items]
Accrued liability associated with the restructuring costs	$ 381	$ 1,026
Severance, Other Termination Benefits and Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Accrued liability associated with the restructuring costs	368	987
Lease and Other Contract Termination Fees [Member]
Restructuring Cost and Reserve [Line Items]
Accrued liability associated with the restructuring costs	8	33
Other [Member]
Restructuring Cost and Reserve [Line Items]
Accrued liability associated with the restructuring costs	$ 5	$ 6

Carrying amount as of the balance sheet date of known and estimated obligations associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid in the next twelve months or in the normal operating cycle if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 5.P.4(b)(2))
-URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747

Name:	us-gaap_RestructuringReserveCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant