Fair Value Measurement - Summary of Warrants Classified as Equity That Are Measured at Fair Value on Nonrecurring Basis (Detail) - Fair Value, Nonrecurring - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Equity:
Warrants	$ 970	$ 970
Fair Value, Inputs, Level 1
Equity:
Warrants	0	0
Fair Value, Inputs, Level 2
Equity:
Warrants	0	0
Fair Value, Inputs, Level 3
Equity:
Warrants	$ 970	$ 970

Fair value portion of warrants not settleable in cash classified as equity.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258

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