Commitments and Contingencies - Schedule of Maturity Analysis of Annual Undiscounted Cash Flows of Operating and Finance Lease Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Commitments And Contingencies Disclosure [Abstract]
Operating Leases, 2022	$ 122
Operating Leases, 2023	75
Operating Leases, 2024	6
Operating Leases, 2025	0
Operating Leases, 2026	0
Total lease payments	203
Operating Leases, Less imputed interest	10
Operating Leases, Total	193	$ 314
Finance Leases, 2022	55
Finance Leases, 2023	53
Finance Leases, 2024	53
Finance Leases, 2025	49
Finance Leases, 2026	6
Total lease payments	216
Finance Leases, Less imputed interest	14
Finance Leases, Total	$ 202	$ 185

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Present value of lessee's discounted obligation for lease payments from finance lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918701-209980

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
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-Section 45
-Paragraph 1
-Subparagraph (b)
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-Publisher FASB
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-SubTopic 20
-Section 45
-Paragraph 1
-Subparagraph (b)
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