Property and Equipment (Details) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 53,975,000	$ 53,975,000	$ 38,007,000
Less: Accumulated depreciation and amortization	(20,126,000)	(20,126,000)	(12,954,000)
Total property and equipment, net	33,849,000	33,849,000	25,053,000
Depreciation and amortization expense		7,300,000	7,100,000	$ 3,200,000
Lease asset impairments and other charges	1,700,000	7,500,000	0	$ 0
Computers and related equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	51,411,000	51,411,000	35,032,000
Furniture and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	846,000	846,000	147,000
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 1,718,000	$ 1,718,000	$ 2,828,000