Organization and Basis of Presentation	3 Months Ended
Mar. 31, 2016
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Organization and Basis of Presentation	NOTE 1: ORGANIZATION AND BASIS OF PRESENTATION Organization. NovoCure Limited (including its consolidated subsidiaries, the “Company”) was incorporated in Jersey and is principally engaged in the development, manufacture and commercialization of TTFields for the treatment of solid tumors. Since inception, the Company has devoted substantially all of its efforts to developing a family of products to deliver TTFields for a variety of solid tumor indications, raising capital and recruiting personnel. The Company has regulatory approvals and clearances in certain countries for Optune, its first TTFields delivery system, to treat glioblastoma. The Company commenced marketing Optune in the United States at the end of 2011, in certain countries in Europe in 2014 and in Japan in 2015. Financial statement preparation. The accompanying condensed consolidated financial statements include the accounts of the Company and its consolidated subsidiaries, and intercompany accounts and transactions have been eliminated. In the opinion of the Company’s management, the condensed consolidated financial statements reflect all adjustments, which are normal and recurring in nature, necessary for fair financial statement presentation. The preparation of these condensed consolidated financial statements in conformity with U.S. generally accepted accounting principles (“GAAP”) requires management to make estimates and assumptions that affect the amounts reported in these condensed consolidated financial statements and accompanying notes. Actual results could differ materially from those estimates. These condensed consolidated financial statements and accompanying notes should be read in conjunction with the Company’s annual consolidated financial statements and the notes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2015 (the “2015 10-K”) filed with the Securities and Exchange Commission (the “SEC”) on March 1, 2016. The significant accounting policies applied in the audited annual consolidated financial statements of the Company as disclosed in the 2015 10-K are applied consistently in these unaudited interim consolidated financial statements. Recently Issued Accounting Pronouncements. In February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2016-02-Leases (ASC 842), which sets out the principles for the recognition, measurement, presentation and disclosure of leases for both parties to a contract (i.e. lessees and lessors). The new standard requires lessees to apply a dual approach, classifying leases as either finance or operating leases based on the principle of whether or not the lease is effectively a financed purchase by the lessee. This classification will determine whether lease expense is recognized based on an effective interest method or on a straight line basis over the term of the lease, respectively. A lessee is also required to record a right-of-use asset and a lease liability for all leases with a term of greater than twelve months regardless of their classification. Leases with a term of twelve months or less will be accounted for similar to existing guidance for operating leases. The new standard requires lessors to account for leases using an approach that is substantially equivalent to existing guidance for sales-type leases, direct financing leases and operating leases. ASC 842 supersedes the previous leases standard, ASC 840. The standard is effective on January 1, 2019, with early adoption permitted. The Company is currently evaluating the impact of the adoption of this standard on its consolidated financial statements. In March 2016, the FASB issued ASU 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting. The amendments in ASU 2016-09 affect all entities that issue share-based payment awards to their employees and involve multiple aspects of the accounting for share-based payment transactions, including income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. ASU 2016-09 is effective for annual periods beginning after December 15, 2016, and interim periods within those annual periods. Early adoption is permitted in any interim or annual period. The Company is currently evaluating the impact of the adoption of this standard on its consolidated financial statements.

NOTE 1: ORGANIZATION AND BASIS OF PRESENTATION

Organization. NovoCure Limited (including its consolidated subsidiaries, the “Company”) was incorporated in Jersey and is principally engaged in the development, manufacture and commercialization of TTFields for the treatment of solid tumors. Since inception, the Company has devoted substantially all of its efforts to developing a family of products to deliver TTFields for a variety of solid tumor indications, raising capital and recruiting personnel. The Company has regulatory approvals and clearances in certain countries for Optune, its first TTFields delivery system, to treat glioblastoma. The Company commenced marketing Optune in the United States at the end of 2011, in certain countries in Europe in 2014 and in Japan in 2015.

Financial statement preparation. The accompanying condensed consolidated financial statements include the accounts of the Company and its consolidated subsidiaries, and intercompany accounts and transactions have been eliminated. In the opinion of the Company’s management, the condensed consolidated financial statements reflect all adjustments, which are normal and recurring in nature, necessary for fair financial statement presentation. The preparation of these condensed consolidated financial statements in conformity with U.S. generally accepted accounting principles (“GAAP”) requires management to make estimates and assumptions that affect the amounts reported in these condensed consolidated financial statements and accompanying notes. Actual results could differ materially from those estimates. These condensed consolidated financial statements and accompanying notes should be read in conjunction with the Company’s annual consolidated financial statements and the notes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2015 (the “2015 10-K”) filed with the Securities and Exchange Commission (the “SEC”) on March 1, 2016.

The significant accounting policies applied in the audited annual consolidated financial statements of the Company as disclosed in the 2015 10-K are applied consistently in these unaudited interim consolidated financial statements.

Recently Issued Accounting Pronouncements. In February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2016-02-Leases (ASC 842), which sets out the principles for the recognition, measurement, presentation and disclosure of leases for both parties to a contract (i.e. lessees and lessors). The new standard requires lessees to apply a dual approach, classifying leases as either finance or operating leases based on the principle of whether or not the lease is effectively a financed purchase by the lessee. This classification will determine whether lease expense is recognized based on an effective interest method or on a straight line basis over the term of the lease, respectively. A lessee is also required to record a right-of-use asset and a lease liability for all leases with a term of greater than twelve months regardless of their classification. Leases with a term of twelve months or less will be accounted for similar to existing guidance for operating leases. The new standard requires lessors to account for leases using an approach that is substantially equivalent to existing guidance for sales-type leases, direct financing leases and operating leases. ASC 842 supersedes the previous leases standard, ASC 840. The standard is effective on January 1, 2019, with early adoption permitted. The Company is currently evaluating the impact of the adoption of this standard on its consolidated financial statements.

In March 2016, the FASB issued ASU 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting. The amendments in ASU 2016-09 affect all entities that issue share-based payment awards to their employees and involve multiple aspects of the accounting for share-based payment transactions, including income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. ASU 2016-09 is effective for annual periods beginning after December 15, 2016, and interim periods within those annual periods. Early adoption is permitted in any interim or annual period. The Company is currently evaluating the impact of the adoption of this standard on its consolidated financial statements.