Subsequent Events	12 Months Ended
Dec. 31, 2019
Subsequent Events [Abstract]
Subsequent Events	Note 15 – Subsequent Events (unaudited) Due to considerations of the effect of the novel coronavirus, the Company announced on March 13, 2020 that it will be holding its SiriusDecisions Summit 2020, its single largest event, as a virtual event during its originally scheduled timeframe in May 2020. The Company estimates the impact of holding the event as a virtual event, as compared to a live event, will reduce revenues by $7.0 million to $9.0 million and will reduce operating income by $4.0 million to $6.0 million.

The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-URI http://asc.fasb.org/topic&trid=2122774

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