Unaudited Condensed Consolidated Statements of Operations and Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Revenue	$ 78,032	$ 65,873
Cost of revenue	30,199	23,837
Gross profit	47,833	42,036
Operating expenses:
Sales and marketing	28,412	23,955
General and administrative	12,001	12,988
Litigation costs and related recoveries:
Professional fees and other costs of litigation	2,752	2,041
Litigation appeal refunds	0	(12,775)
Insurance costs and recoveries, net	921	4,639
Litigation costs and related recoveries, net	3,673	(6,095)
Total operating expenses	44,086	30,848
Operating income	3,747	11,188
Non-operating income and (expenses):
Interest expense	(13)	(232)
Other income (expenses), net	(218)	43
Income before income taxes	3,516	10,999
Income tax expense	(971)	(705)
Net income	2,545	10,294
Other comprehensive income:
Foreign currency translation gain (loss)	(813)	1
Comprehensive income	1,732	10,295
Net loss attributable to common stockholders	$ (4,085)	$ 3,488
Net income (loss) per share attributable to common stockholders:
Basic (usd per share)	$ (0.06)	$ 0.05
Diluted (usd per share)	$ (0.06)	$ 0.05
Weighted average number of shares of Common Stock outstanding:
Basic (shares)	67,863,000	64,622,000
Diluted (shares)	67,863,000	69,101,000