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Leases - Maturity Analysis of Undiscounted Payments for Operating Lease Liabilities and Reconciliation with Carrying Amount of Lease Liability (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Undiscounted lease payments
Remainder of 2021	$ 405
2022	1,774
2023	1,808
2024	1,842
2025	1,876
2026 and thereafter	9,112
Total undiscounted payments	16,817
Discount Adjustments	(6,358)
Current operating lease liability	$ 1,730
Operating lease, liability, current, statement of financial position [Extensible List]	Accrued expenses and other current liabilities
Long-term operating lease liability	$ 8,729	$ 9,153

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- Definition

Lessee operating lease liability payments due year five and thereafter.

+ References

No definition available.

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- Definition

Amount of lessee's undiscounted obligation for lease payment for operating 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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- Definition

Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

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-Publisher FASB
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-SubTopic 20
-Section 50
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Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

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-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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Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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-Topic 842
-SubTopic 20
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Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

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-SubTopic 20
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-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918701-209980

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Amount of lessee's undiscounted obligation for lease payment for operating lease having initial or remaining lease term in excess of one year to be paid in remainder of current fiscal year.

+ References

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-Publisher FASB
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- Definition

Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for operating lease.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
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- References

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- Definition

Present value of lessee's discounted obligation for lease payments from operating lease, classified as current.

+ References

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-Publisher FASB
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Indicates line item in statement of financial position that includes current operating lease liability.

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- Definition

Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent.

+ References

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