Business Overview	3 Months Ended
Mar. 31, 2021
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Business Overview	Note 1: Business Overview GW Pharmaceuticals plc and its subsidiaries (referred to herein as “we,” “us,” “our,” and the “Company”) is a biopharmaceutical company focused on discovering, developing and commercializing novel therapeutics from our proprietary cannabinoid product platform in a broad range of disease areas. The Company is developing a portfolio of cannabinoid medicines, of which the lead product is Epidiolex^®, an oral medicine for the treatment of certain refractory childhood epilepsies. The Company is a public limited company, which has American Depository Shares (ADSs) registered with the U.S. Securities and Exchange Commission (SEC) and has been listed on Nasdaq since May 1, 2013. The Company’s ADSs each represent twelve ordinary shares of GW Pharmaceuticals plc. The Company is incorporated and domiciled in the United Kingdom. The address of the Company’s registered office and principal place of business is Sovereign House, Vision Park, Histon, Cambridgeshire. On February 3, 2021, the Company entered into a transaction agreement (the Transaction Agreement) with Jazz Pharmaceuticals Public Limited Company, a public limited company incorporated in Ireland (Jazz), and Jazz Pharmaceuticals UK Holdings Limited, a private limited company incorporated in England and Wales and a wholly owned subsidiary of Jazz (Bidco), under which Bidco has agreed to acquire the entire issued and to be issued share capital of the Company by means of a court-sanctioned scheme of arrangement under Part 26 of the U.K. Companies Act 2006, subject to the conditions described therein (the Scheme of Arrangement and such acquisition, the Transaction). On April 23, 2021, the Company held a meeting of shareholders convened with the permission of the High Court of Justice of England and Wales (the Court Meeting) and a general meeting of shareholders (the General Meeting and, together with the Court Meeting, the Shareholder Meetings), in each case in connection with the Transaction. At the Shareholder Meetings, the proposals required to be approved by the Company’s shareholders in order to complete the Transaction were each approved. Completion of the Transaction remains subject to the sanction by the High Court of Justice of England and Wales (the Court) and other customary closing conditions. The Court hearing to sanction the Transaction is currently scheduled for May 5, 2021, and the completion of the Transaction is expected to occur shortly thereafter.

Business Overview

3 Months Ended

Mar. 31, 2021

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Note 1: Business Overview

GW Pharmaceuticals plc and its subsidiaries (referred to herein as “we,” “us,” “our,” and the “Company”) is a biopharmaceutical company focused on discovering, developing and commercializing novel therapeutics from our proprietary cannabinoid product platform in a broad range of disease areas. The Company is developing a portfolio of cannabinoid medicines, of which the lead product is Epidiolex^®, an oral medicine for the treatment of certain refractory childhood epilepsies.

The Company is a public limited company, which has American Depository Shares (ADSs) registered with the U.S. Securities and Exchange Commission (SEC) and has been listed on Nasdaq since May 1, 2013. The Company’s ADSs each represent twelve ordinary shares of GW Pharmaceuticals plc. The Company is incorporated and domiciled in the United Kingdom. The address of the Company’s registered office and principal place of business is Sovereign House, Vision Park, Histon, Cambridgeshire.

On February 3, 2021, the Company entered into a transaction agreement (the Transaction Agreement) with Jazz Pharmaceuticals Public Limited Company, a public limited company incorporated in Ireland (Jazz), and Jazz Pharmaceuticals UK Holdings Limited, a private limited company incorporated in England and Wales and a wholly owned subsidiary of Jazz (Bidco), under which Bidco has agreed to acquire the entire issued and to be issued share capital of the Company by means of a court-sanctioned scheme of arrangement under Part 26 of the U.K. Companies Act 2006, subject to the conditions described therein (the Scheme of Arrangement and such acquisition, the Transaction). On April 23, 2021, the Company held a meeting of shareholders convened with the permission of the High Court of Justice of England and Wales (the Court Meeting) and a general meeting of shareholders (the General Meeting and, together with the Court Meeting, the Shareholder Meetings), in each case in connection with the Transaction. At the Shareholder Meetings, the proposals required to be approved by the Company’s shareholders in order to complete the Transaction were each approved. Completion of the Transaction remains subject to the sanction by the High Court of Justice of England and Wales (the Court) and other customary closing conditions. The Court hearing to sanction the Transaction is currently scheduled for May 5, 2021, and the completion of the Transaction is expected to occur shortly thereafter.

GW PHARMACEUTICALS PLC 10-Q