Property and Equipment

12 Months Ended

Dec. 31, 2020

Property, Plant and Equipment [Abstract]

Property and Equipment

Property and Equipment

The components of property and equipment were as follows:

		December 31,
	Useful Lives (years)	2020		2019
Leasehold improvements	Shorter of lease term or economic life	$	29,558	$	28,141
Website and software development costs	2-3	33,278		27,602
Computer and office equipment	3	7,765		4,846
Software	3	1,858		595
Furniture	7	7,450		6,965
Property and equipment, gross		79,909		68,149
Accumulated depreciation and amortization		(41,614)		(29,047)
Construction in progress		5,693		475
Property and equipment, net		$	43,988	$	39,577

Depreciation and amortization expense for property and equipment amounted to $14,076, $8,742, and $7,977 for the years ended December 31, 2020, 2019, and 2018, respectively. We capitalized software development costs, including stock-based compensation, of $11,414, $8,396, and $5,796 during the years ended December 31, 2020, 2019, and 2018, respectively.