Consolidated Statements of Operations - USD ($) shares in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Income Statement [Abstract]
Revenue	$ 156,414,000	$ 124,685,000
Expenses:
Cost of revenue	57,391,000	60,003,000
Sales and marketing	44,565,000	44,556,000
Technology and development	40,269,000	37,863,000
General and administrative	41,772,000	42,431,000
Restructuring and other exit costs	0	3,440,000
Total expenses	183,997,000	188,293,000
Loss from operations	(27,583,000)	(63,608,000)
Other (income) expense:
Interest income, net	(789,000)	(988,000)
Other income	(285,000)	(766,000)
Foreign exchange (gain) loss, net	481,000	(389,000)
Total other (income) expense, net	(593,000)	(2,143,000)
Loss before income taxes	(26,990,000)	(61,465,000)
Provision (benefit) for income taxes	(1,512,000)	357,000
Net loss	$ (25,478,000)	$ (61,822,000)
Net loss per share:
Basic and Diluted (usd per share)	$ (0.48)	$ (1.23)
Weighted average shares used to compute net loss per share:
Basic and Diluted (in shares)	52,614	50,259