Geographical Information (Tables)

12 Months Ended

Dec. 31, 2015

Segment Reporting [Abstract]

Revenue and Long Lived Assets by Geographic Area

	United States		Foreign Countries		Total
Revenues, less transaction-based expenses:
Year ended December 31, 2015	$	1,971	$	1,367	$	3,338
Year ended December 31, 2014	$	1,859	$	1,233	$	3,092
Year ended December 31, 2013	$	842	$	756	$	1,598
Net assets:
As of December 31, 2015	$	7,915	$	6,960	$	14,875
As of December 31, 2014	$	5,437	$	7,120	$	12,557
Property and equipment, net:
As of December 31, 2015	$	888	$	149	$	1,037
As of December 31, 2014	$	734	$	140	$	874