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	$ 11,490	$ 11,831
Less: Accumulated depreciation and amortization	(8,555)	(7,959)
Property and equipment, net	2,935	3,872
Depreciation and amortization expense	2,135	2,443	$ 2,596
Computer Equipment
Property and equipment
Property and equipment	5,955	5,619
Furniture
Property and equipment
Property and equipment	3,075	3,147
Purchase software for internal use
Property and equipment
Property and equipment	698	679
Leasehold improvements
Property and equipment
Property and equipment	$ 1,762	$ 2,386

The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

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Amount of accumulated depreciation and amortization from plant, property, and equipment and right-of-use asset from finance lease.

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