Commitments and Contingencies	9 Months Ended
Oct. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Leases The Company leases office space under noncancelable operating leases for its San Francisco, California headquarters, as well as its offices in various cities in the United States, United Kingdom, Australia and Canada. These office leases expire on various dates through October 2028. Deferred rent was $34.1 million and $5.5 million as of October 31, 2018 and January 31, 2018, respectively, which is included in accrued expenses and other current liabilities and other liabilities, noncurrent in the condensed consolidated balance sheets. Rent expense was $7.0 million and $3.0 million for the three months ended October 31, 2018 and 2017, respectively and $16.2 million and $7.6 million for the nine months ended October 31, 2018 and 2017, respectively. In conjunction with the execution of leases, letters of credit in the aggregate amount of $12.5 million and $12.2 million were issued and outstanding as of October 31, 2018 and January 31, 2018, respectively. No draws have been made under such letters of credit. The Company secured its new corporate headquarters lease in San Francisco with an $8.0 million letter of credit, which is designated as restricted cash and included in other assets on its condensed consolidated balance sheet as of October 31, 2018. In June 2018, the Company signed an agreement to sublease the premises at 634 2nd Street, San Francisco, California (2nd Street Sublease), which, together with the premises at 301 Brannan Street, San Francisco, California, comprise the Company’s current headquarters. The term of the 2nd Street Sublease agreement commences on January 31, 2019. The 2nd Street Sublease and the master lease both expire in September 2024. The Company’s future income under the terms of the 2nd Street Sublease agreement will be approximately equal to the amount required to be paid by the Company to its landlord under the terms of the master lease. The Company and the sub-lessee executed a standby letter of credit amounting to $3.0 million to be held by the Company to secure the 2nd Street Sublease in the event of uncured default by the sub-lessee. Pursuant to a termination agreement pertaining to the Company’s lease of the premises at 301 Brannan Street, San Francisco, California, the non-cancellable lease term for those premises now expires in January 2019 instead of July 2019. Other Contractual Commitments In September 2018, the Company entered into a non-cancellable contractual agreement with a third-party provider of datacenter hosting facilities with a term of four years. The total future commitment of $60.0 million is ratable over the four-year term of this agreement. This agreement superseded a prior agreement that was signed in July 2017 with a total commitment of $30.0 million over its three-year term. The agreement is on the third-party provider’s standard terms and conditions. Legal Matters From time to time in the normal course of business, the Company may be subject to various legal matters such as threatened or pending claims or proceedings. There were no such material matters as of October 31, 2018.

Commitments and Contingencies

Leases

The Company leases office space under noncancelable operating leases for its San Francisco, California headquarters, as well as its offices in various cities in the United States, United Kingdom, Australia and Canada. These office leases expire on various dates through October 2028.

Deferred rent was $34.1 million and $5.5 million as of October 31, 2018 and January 31, 2018, respectively, which is included in accrued expenses and other current liabilities and other liabilities, noncurrent in the condensed consolidated balance sheets. Rent expense was $7.0 million and $3.0 million for the three months ended October 31, 2018 and 2017, respectively and $16.2 million and $7.6 million for the nine months ended October 31, 2018 and 2017, respectively.

In conjunction with the execution of leases, letters of credit in the aggregate amount of $12.5 million and $12.2 million were issued and outstanding as of October 31, 2018 and January 31, 2018, respectively. No draws have been made under such letters of credit. The Company secured its new corporate headquarters lease in San Francisco with an $8.0 million letter of credit, which is designated as restricted cash and included in other assets on its condensed consolidated balance sheet as of October 31, 2018.

In June 2018, the Company signed an agreement to sublease the premises at 634 2nd Street, San Francisco, California (2nd Street Sublease), which, together with the premises at 301 Brannan Street, San Francisco, California, comprise the Company’s current headquarters. The term of the 2nd Street Sublease agreement commences on January 31, 2019. The 2nd Street Sublease and the master lease both expire in September 2024. The Company’s future income under the terms of the 2nd Street Sublease agreement will be approximately equal to the amount required to be paid by the Company to its landlord under the terms of the master lease. The Company and the sub-lessee executed a standby letter of credit amounting to $3.0 million to be held by the Company to secure the 2nd Street Sublease in the event of uncured default by the sub-lessee.

Pursuant to a termination agreement pertaining to the Company’s lease of the premises at 301 Brannan Street, San Francisco, California, the non-cancellable lease term for those premises now expires in January 2019 instead of July 2019.

Other Contractual Commitments

In September 2018, the Company entered into a non-cancellable contractual agreement with a third-party provider of datacenter hosting facilities with a term of four years. The total future commitment of $60.0 million is ratable over the four-year term of this agreement. This agreement superseded a prior agreement that was signed in July 2017 with a total commitment of $30.0 million over its three-year term. The agreement is on the third-party provider’s standard terms and conditions.

Legal Matters

From time to time in the normal course of business, the Company may be subject to various legal matters such as threatened or pending claims or proceedings. There were no such material matters as of October 31, 2018.