Unaudited Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Statement [Abstract]
Revenue	$ 4,406	$ 431
Cost and expense
Cost of revenue (excluding depreciation and amortization)	2,752	21
Sales and marketing	1,001	416
Technology and development	1,550	648
General and administrative	2,697	2,740
Depreciation and amortization	66	90
Total cost and expense	8,066	3,915
Operating loss	(3,660)	(3,484)
Other income (expense)
Interest expense	(235)	(461)
Other income, net	1	0
Change in fair value of warrant liability	(1,610)	57
Gain on lease termination	0	1,538
Other income (loss), net	43	(73)
Total other income (expense), net	(1,801)	1,061
Net loss	(5,461)	(2,423)
Other comprehensive loss
Foreign currency translation adjustments	42	182
Comprehensive loss	$ (5,419)	$ (2,241)
Weighted-average shares outstanding, basic and diluted (in shares)	99,759	53,775
Net loss per share, basic and diluted (in dollars per share)	$ (0.05)	$ (0.05)