Accrued Expenses - Summary of Components of Accrued Expenses (Detail) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Total accrued expenses	$ 25,417	$ 7,408
Accrued payroll [Member]
Total accrued expenses	6,411	686
Accrued professional fees [Member]
Total accrued expenses	607	468
Accrued other [Member]
Total accrued expenses	14	254
Accrued vendor expenses [Member]
Total accrued expenses	18,385	0
Accrued legal cost [Member]
Total accrued expenses	$ 0	$ 6,000

Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within 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
-Paragraph 1
-Subparagraph (SX 210.5-02.20)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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