Segments - Summary of Segment Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Revenue	$ 218,336,000	$ 141,406,000	$ 80,228,000
Segment Losses	(61,381,000)	(31,085,000)
Segment Property and Equipment	10,287,000	6,113,000
Segment Depreciation and Amortization	3,596,000	3,120,000	1,847,000
Segment Expenditures for Property and Equipment and Long-Lived Assets	6,262,000	4,190,000	2,693,000
Segment Impairments of Goodwill and Intangible Assets		1,592,000	1,719,000
U.S.
Segment Reporting Information [Line Items]
Revenue	202,034,000	138,272,000
Segment Losses	(51,230,000)	(22,130,000)
Segment Property and Equipment	9,057,000	5,612,000
Segment Depreciation and Amortization	3,208,000	2,389,000
Segment Expenditures for Property and Equipment and Long-Lived Assets	5,636,000	3,671,000
Segment Impairments of Goodwill and Intangible Assets		83,000
International
Segment Reporting Information [Line Items]
Revenue	16,302,000	3,134,000	100,000
Segment Losses	(10,151,000)	(8,955,000)	(400,000)
Segment Property and Equipment	1,230,000	501,000	42,000
Segment Depreciation and Amortization	388,000	731,000	100,000
Segment Expenditures for Property and Equipment and Long-Lived Assets	$ 626,000	519,000	$ 13,000
Segment Impairments of Goodwill and Intangible Assets		$ 1,509,000