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Stockholders' (Deficit) Equity - Summary of Common Shares Reserved for Issuance (Detail) - shares	Dec. 31, 2020	Dec. 31, 2019
Class Of Stock [Line Items]
Total shares reserved for future issuance	7,101,126	8,874,291
Outstanding Stock Options
Class Of Stock [Line Items]
Total shares reserved for future issuance	4,996,284	6,080,483
Outstanding RSUs
Class Of Stock [Line Items]
Total shares reserved for future issuance	466,842	1,155,808
Outstanding related party warrants
Class Of Stock [Line Items]
Total shares reserved for future issuance	1,638,000	1,638,000

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- Definition

Aggregate number of common shares reserved for future issuance.

+ References

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 210.5-02.29)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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