Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Loss before Income Taxes
United States	$ (48,898)	$ (44,137)	$ (56,852)
International	2,184	2,400	1,695
Total	(46,714)	(41,737)	(55,157)
Income tax expense, current:
State	32	26	36
Foreign	2,144	1,454	1,196
Total current income tax expense	2,176	1,480	1,232
Foreign	(44)	(133)	(90)
Total deferred income tax benefit	(44)	(133)	(90)
Total income tax expense	$ 2,132	$ 1,347	$ 1,142