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Property and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Property and equipment
Property and equipment, gross	$ 51,068	$ 38,713
Less accumulated depreciation and amortization	(22,828)	(17,031)
Property and equipment, net	28,240	21,682
Depreciation and amortization expense	6,300	4,700	$ 3,400
Computers, software and equipment
Property and equipment
Property and equipment, gross	41,955	31,229
Furniture and fixtures
Property and equipment
Property and equipment, gross	539	527
Leasehold and tenant improvements
Property and equipment
Property and equipment, gross	$ 8,574	$ 6,957

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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