Stockholders' Equity	6 Months Ended
Jul. 31, 2018
Stockholders Equity Note [Abstract]
Stockholders' Equity	Note 9. Stockholders’ Equity Material modification of rights of security holders On June 14, 2018, all of our outstanding shares of Class B common stock automatically converted into the same number of shares of Class A common stock pursuant to the terms of our Amended and Restated Certificate of Incorporation. No additional shares of Class B common stock will be issued following such conversion. The conversion occurred pursuant to Article IV of the Amended and Restated Certificate of Incorporation, which provided that each one share of Class B common stock would convert automatically, without any further action, into one share of Class A common stock on the first trading day falling on or after the date on which the outstanding shares of Class B common stock represent less than 5% of the aggregate number of shares of the then outstanding Class A common stock and Class B common stock. On June 15, 2018, we filed a certificate with the Secretary of State of the State of Delaware effecting the retirement and cancellation of our Class B common stock. This certificate of retirement had the additional effect of eliminating the authorized Class B common stock, thereby reducing the total number of our authorized shares of common stock by 200,000,000. Our Class A and Class B common stock are referred to as common stock throughout the notes to the financial statements, unless otherwise noted. After June 14, 2018, common stock refers to our Class A common stock. Common stock As of July 31, 2018, we had authorized 1,000,000,000 shares of Class A common stock, par value of $0.0001 per share. As of July 31, 2018, 141,605,601 shares of Class A common stock were issued and outstanding. As of January 31, 2018, we had authorized 1,000,000,000 shares of Class A common stock and 200,000,000 shares of Class B common stock, each at par value of $0.0001 per share. As of January 31, 2018, 125,933,323 shares of Class A common stock and 11,383,525 shares of Class B common stock were issued and outstanding. Preferred stock As of July 31, 2018 and January 31, 2018, we had authorized 100,000,000 shares of undesignated preferred stock, par value of $0.0001 per share. No shares issued and outstanding in the same respective periods.

Note 9. Stockholders’ Equity

Material modification of rights of security holders

On June 14, 2018, all of our outstanding shares of Class B common stock automatically converted into the same number of shares of Class A common stock pursuant to the terms of our Amended and Restated Certificate of Incorporation. No additional shares of Class B common stock will be issued following such conversion. The conversion occurred pursuant to Article IV of the Amended and Restated Certificate of Incorporation, which provided that each one share of Class B common stock would convert automatically, without any further action, into one share of Class A common stock on the first trading day falling on or after the date on which the outstanding shares of Class B common stock represent less than 5% of the aggregate number of shares of the then outstanding Class A common stock and Class B common stock. On June 15, 2018, we filed a certificate with the Secretary of State of the State of Delaware effecting the retirement and cancellation of our Class B common stock. This certificate of retirement had the additional effect of eliminating the authorized Class B common stock, thereby reducing the total number of our authorized shares of common stock by 200,000,000.

Our Class A and Class B common stock are referred to as common stock throughout the notes to the financial statements, unless otherwise noted. After June 14, 2018, common stock refers to our Class A common stock.

Common stock

As of July 31, 2018, we had authorized 1,000,000,000 shares of Class A common stock, par value of $0.0001 per share. As of July 31, 2018, 141,605,601 shares of Class A common stock were issued and outstanding.

As of January 31, 2018, we had authorized 1,000,000,000 shares of Class A common stock and 200,000,000 shares of Class B common stock, each at par value of $0.0001 per share. As of January 31, 2018, 125,933,323 shares of Class A common stock and 11,383,525 shares of Class B common stock were issued and outstanding.

Preferred stock

As of July 31, 2018 and January 31, 2018, we had authorized 100,000,000 shares of undesignated preferred stock, par value of $0.0001 per share. No shares issued and outstanding in the same respective periods.