Commitments and Contingencies - Additional Information (Details)		1 Months Ended		3 Months Ended	9 Months Ended
	Mar. 31, 2019 ExtensionPeriod	Oct. 31, 2020 USD ($) ExtensionPeriod	Mar. 31, 2019	Sep. 30, 2021 USD ($)	Sep. 30, 2021 USD ($) Warehouse	Jan. 01, 2021 USD ($)	Dec. 31, 2020 USD ($)
Lessee Lease Description [Line Items]
Operating lease, number of extension options | ExtensionPeriod		2
Operating lease right-of-use assets		$ 42,167,000		$ 42,855,000	$ 42,855,000	$ 1,200,000	$ 0
Operating lease liability		$ 28,648,000		$ 29,404,000	$ 29,404,000	$ 1,300,000
Operating lease, remaining lease term		238 months		10 months	10 months
Weighted average incremental borrowing rate				6.00%	6.00%
Operating lease, rent expense				$ 186,000	$ 557,000
Cash paid for amounts included in the measurement of lease liabilities				13,718,000	14,116,000
Operating lease cost				186,000	557,000
Tenant allowance		$ 13,519,000
Tenant allowance related to prepaid lease payments		3,673,000
Equipment
Lessee Lease Description [Line Items]
Operating lease right-of-use assets				114,000	114,000
Operating lease liability				$ 113,000	$ 113,000
Operating lease, remaining lease term				46 months	46 months
Letter of Credit
Lessee Lease Description [Line Items]
Secured debt		$ 1,500,000
Maximum
Lessee Lease Description [Line Items]
Operating lease, term of contract	12 months		12 months
Irvine, California
Lessee Lease Description [Line Items]
Operating lease, term of contract	5 years	10 years	5 years
Operating lease, expiration date	Sep. 30, 2024
Operating lease, number of extension options | ExtensionPeriod	2
Option to extend, operating lease, term	5 years	5 years	5 years
Operating lease, Existence of option to extend		true	true
Operating lease, rent holiday concession period	1 month
Operating lease, description					The lease includes a one-month rent holiday concession and escalation clauses for increased rent over the lease term.
Operating lease right-of-use assets				$ 521,000	$ 521,000
Operating lease liability				589,000	589,000
Cash paid for amounts included in the measurement of lease liabilities					13,519,000
Lake Forest, California and Irvine, California
Lessee Lease Description [Line Items]
Operating lease right-of-use assets				53,000	53,000
Operating lease liability				$ 54,000	$ 54,000
Operating lease, remaining lease term				9 months	9 months
Number of additional warehouse spaces | Warehouse					2