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Related Party Transactions	3 Months Ended
Related Party Transactions	Mar. 31, 2019
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions We subscribe to various cloud-based applications from Salesforce. Bret Taylor, a member of our Board of Directors, serves as President and Chief Product Officer of Salesforce. We incur costs at different times throughout the year, typically in advance of services being provided, and subsequently amortize these costs ratably to expense as services are provided over the contractual term. The cost to subscribe to various cloud-based hosting arrangements from Salesforce and Quip was $0.5 million and $0.4 million for the three months ended March 31, 2019 and 2018, respectively. As of March 31, 2019, $0.1 million was due to Salesforce for such arrangements. Amounts due to Salesforce as of December 31, 2018 were negligible.