Related Party Transactions	12 Months Ended
Dec. 31, 2019
Related Party Transactions [Abstract]
Related Party Transactions	Related Party TransactionsWe subscribe to a mobile collaboration software suite from Quip, a company that was co-founded and managed by Bret Taylor, a former member of our Board of Directors. Mr. Taylor resigned from the Board of Directors in June 2019. In April 2016, Quip was acquired by Salesforce, and subsequent to the acquisition, we continued to consider Quip a related party. In November 2017, Mr. Taylor was appointed to President and Chief Product Officer of Salesforce. We consider the consolidated Salesforce entity to be a related party through the year ended December 31, 2019. The cost to subscribe to various cloud-based hosting arrangements from Salesforce and Quip was $1.9 million, $1.8 million and $1.2 million for the years ended December 31, 2019, 2018 and 2017, respectively. Amounts owed as of December 31, 2019 and 2018 were negligible.

Related Party Transactions

12 Months Ended

Dec. 31, 2019

Related Party TransactionsWe subscribe to a mobile collaboration software suite from Quip, a company that was co-founded and managed by Bret Taylor, a former member of our Board of Directors. Mr. Taylor resigned from the Board of Directors in June 2019. In April 2016, Quip was acquired by Salesforce, and subsequent to the acquisition, we continued to consider Quip a related party. In November 2017, Mr. Taylor was appointed to President and Chief Product Officer of Salesforce. We consider the consolidated Salesforce entity to be a related party through the year ended December 31, 2019. The cost to subscribe to various cloud-based hosting arrangements from Salesforce and Quip was $1.9 million, $1.8 million and $1.2 million for the years ended December 31, 2019, 2018 and 2017, respectively. Amounts owed as of December 31, 2019 and 2018 were negligible.