Related-Party Transactions - Summary of Terms of Letter Agreements (Detail) - MacAndrews & Forbes Incorporated [Member] - Class A Common Stock [Member] - USD ($) $ / shares in Units, $ in Millions	Dec. 31, 2019	Sep. 26, 2019	Mar. 18, 2019	Dec. 11, 2018	Jul. 30, 2018	Dec. 05, 2017
2017 Letter Agreement [Member]
Class Of Warrant Or Right [Line Items]
Aggregate dollar value to be sold under agreement						$ 10.0
Specified purchase price per share						$ 4.38
Expiration date of letter agreement						Dec. 05, 2018
Shares available to be issued under related warrants						198,267
Exercise price of related warrants						$ 5.04
Expiration date of related warrants						Dec. 05, 2024
Total shares issued as of December 31, 2021						2,283,105
2018 Letter Agreement [Member]
Class Of Warrant Or Right [Line Items]
Aggregate dollar value to be sold under agreement				$ 10.0	$ 10.0
Specified purchase price per share				$ 1.84	$ 1.33
Expiration date of letter agreement				Dec. 11, 2019	Jul. 30, 2019
Shares available to be issued under related warrants				340,534	518,654
Exercise price of related warrants				$ 2.12	$ 1.53
Expiration date of related warrants				Dec. 11, 2025	Jul. 30, 2025
Total shares issued as of December 31, 2021				5,434,783	7,518,797
2019 Letter Agreement [Member]
Class Of Warrant Or Right [Line Items]
Aggregate dollar value to be sold under agreement	$ 10.0	$ 10.0	$ 9.0
Specified purchase price per share	$ 1.60	$ 1.46	$ 1.65
Expiration date of letter agreement	Dec. 23, 2020	Sep. 26, 2020	Mar. 18, 2020
Shares available to be issued under related warrants	365,472	400,990
Exercise price of related warrants	$ 1.84	$ 1.68
Expiration date of related warrants	Dec. 23, 2026	Sep. 26, 2026
Total shares issued as of December 31, 2021	6,250,000	6,849,316	5,454,546