UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Revenue	$ 20,055	$ 13,069
Costs and operating expenses:
Cost of revenue, excluding depreciation and amortization	14,445	8,046
Product development	2,991	2,552
Sales and marketing	1,922	2,937
General and administrative	7,048	7,932
Acquisition costs	0	3,308
Depreciation and amortization	2,645	2,679
Total cost and operating expenses	29,051	27,454
Operating loss	(8,996)	(14,385)
Nonoperating expenses, net	525	1,616
Loss before income taxes	(9,521)	(16,001)
Income tax benefit	(97)	(167)
Net loss	$ (9,424)	$ (15,834)
Net loss per share - basic (in dollars per share)	$ (0.07)	$ (0.15)
Net loss per share - diluted (in dollars per share)	$ (0.07)	$ (0.15)
Weighted-average shares outstanding during the period - basic (in shares)	138,257,442	103,565,745
Weighted-average shares outstanding during the period - diluted (in shares)	138,257,442	103,565,745
Other comprehensive income (loss):
Foreign currency translation loss	$ 0	$ (3,150)
Comprehensive loss	$ (9,424)	$ (18,984)