UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Income [Abstract]
Revenue	$ 15,466	$ 20,055
Costs and operating expenses:
Cost of revenue, excluding depreciation and amortization	10,247	14,445
Product development	1,999	2,991
Sales and marketing	1,277	1,922
General and administrative	9,721	7,048
Depreciation and amortization	2,393	2,645
Total costs and operating expenses	25,637	29,051
Operating loss	(10,171)	(8,996)
Nonoperating expenses (income), net	(3,572)	525
Loss before income taxes	(6,599)	(9,521)
Income tax benefit	(48)	(97)
Net loss	(6,551)	(9,424)
Dividends and accretion of redemption premium on Redeemable Preferred Stock	647	0
Net loss attributable to common equity	$ (7,198)	$ (9,424)
Net loss per share - basic (in dollars per share)	$ (0.05)	$ (0.07)
Net loss per share - diluted (in dollars per share)	$ (0.05)	$ (0.07)
Weighted-average shares outstanding during the period - basic (in shares)	141,095,174	138,257,442
Weighted-average shares outstanding during the period - diluted (in shares)	141,095,174	138,257,442
Net loss	$ (6,551)	$ (9,424)
Other comprehensive loss:
Foreign currency translation loss	(658)	0
Comprehensive loss	$ (7,209)	$ (9,424)