Accrued Liabilities - Schedule of Accrued Liabilities (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Sep. 30, 2017
Accrued Liabilities Current [Abstract]
Accrued professional fees	$ 435	$ 501
Accrued clinical study expense	1,134	411
Accrued inventory purchases	919	596
Customer claim	1,000
Deferred rent	118	18
Acquisition of in process research and development	500
Other	156	247
Total	$ 4,262	$ 1,773

Amount of expenses incurred but not yet paid classified as other, due within one year or the normal operating cycle, if longer.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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