Property and Equipment, net (Tables)

12 Months Ended

Dec. 31, 2017

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment [Table Text Block]

Property and equipment, net as of December 31, 2017 and 2016 consists of the following:

		December 31,
	Estimated useful life	2017			2016
Furniture and fixtures	5-10 years	$	2,958		$	2,934
Computers and equipment	3-5 years	18,950			20,321
Software	3-6 years	5,430			5,907
Capitalized internal-use software development costs	3 years	4,102			1,078
Leasehold improvements	Shorter of lease term or useful life	5,650			5,601
Construction in progress		19			98
Property and equipment, gross		37,109			35,939
Less: Accumulated depreciation and amortization		(23,102		)	(20,701		)
Property and equipment, net		$	14,007		$	15,238