Warrants - Additional Information (Details) - USD ($)	3 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Class Of Warrant Or Right [Line Items]
Fair value adjustment of warrants	$ 0	$ 266,000
Series B Convertible Preferred Stock Warrants
Class Of Warrant Or Right [Line Items]
Warrants additional extended expiration period	2 years
Fair value adjustment of warrants	$ 0	$ 266,000
Number of common shares into which each warrant may be exchanged	5

Amount of expense (income) related to adjustment to fair value of warrant liability.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 480
-SubTopic 10
-Section 25
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=109262497&loc=d3e20148-110875

Name:	us-gaap_FairValueAdjustmentOfWarrants
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration