Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenues:
Total revenues	$ 127,679	$ 118,136	$ 400,896	$ 360,587
Operating expenses:
Selling and marketing	44,231	41,340	133,249	123,175
General and administrative	16,448	14,383	47,897	41,895
Depreciation	2,374	2,342	6,992	6,887
Amortization of intangible assets	3,352	3,696	10,068	11,567
Integration costs	0	0	0	334
Total operating expenses	119,122	111,597	365,165	333,429
Income from operations	8,557	6,539	35,731	27,158
Interest expense	(584)	(1,056)	(1,732)	(3,251)
Other income (expense), net	346	(195)	192	(866)
Gains from investments, net	0	0	426	0
Income before income taxes	8,319	5,288	34,617	23,041
Income tax expense	2,905	766	11,181	6,220
Net income	$ 5,414	$ 4,522	$ 23,436	$ 16,821
Basic income per common share	$ 0.29	$ 0.24	$ 1.24	$ 0.88
Diluted income per common share	$ 0.28	$ 0.23	$ 1.22	$ 0.87
Basic weighted average common shares outstanding	18,958	19,134	18,939	19,107
Diluted weighted average common shares outstanding	19,139	19,388	19,192	19,351
Research [Member]
Revenues:
Total revenues	$ 87,038	$ 79,876	$ 262,265	$ 235,846
Consulting [Member]
Revenues:
Total revenues	37,382	37,393	115,075	116,903
Events [Member]
Revenues:
Total revenues	3,259	867	23,556	7,838
Cost of Services and Fulfillment [Member]
Operating expenses:
Cost of services and fulfillment	$ 52,717	$ 49,836	$ 166,959	$ 149,571