Summary Selected Quarterly Financial Data (unaudited) (Tables)

12 Months Ended

Dec. 31, 2019

Quarterly Financial Information Disclosure [Abstract]

Summary of Selected Consolidated Quarterly Financial Data

The following is a summary of selected unaudited consolidated quarterly financial data for the years ended December 31, 2019 and 2018 (in thousands, except per share data). On January 3, 2019, the Company acquired SiriusDecisions, Inc. The quarterly reported results for 2019 include the operating results of SiriusDecisions beginning as of the acquisition date, which impacts the comparability to the 2018 quarterly reported results in the table below. Refer to Note 2 – Acquisitions for additional information.

	Three Months Ended
	March 31,			June 30,		September 30,			December 31,
	2019			2019		2019			2019
Total revenues	$	100,649		$	128,183	$	108,596		$	124,269
Income (loss) from operations	$	(10,884	)	$	4,622	$	(1,640	)	$	6,827
Net income (loss)	$	(13,316	)	$	1,555	$	(2,699	)	$	4,890
Basic income (loss) per common share	$	(0.73	)	$	0.08	$	(0.15	)	$	0.26
Diluted income (loss) per common share	$	(0.73	)	$	0.08	$	(0.15	)	$	0.26

	Three Months Ended
	March 31,			June 30,		September 30,		December 31,
	2018			2018		2018		2018
Total revenues	$	77,749		$	96,353	$	84,890	$	98,583
Income (loss) from operations	$	(2,288	)	$	11,027	$	4,942	$	8,744
Net income (loss)	$	(1,733	)	$	7,788	$	3,950	$	5,375
Basic income (loss) per common share	$	(0.10	)	$	0.43	$	0.22	$	0.29
Diluted income (loss) per common share	$	(0.10	)	$	0.43	$	0.21	$	0.29