Organization and Summary of Significant Accounting Policies	3 Months Ended
Mar. 31, 2014
Accounting Policies [Abstract]
Organization and Summary of Significant Accounting Policies	1. ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Company Overview—Demandware, Inc. (the “Company”) provides enterprise-class cloud-based digital commerce solutions that enable companies to easily design, implement and manage their own customized digital commerce sites, including websites, mobile applications, in-store solutions and other digital storefronts. The Company’s digital commerce platform, Demandware Commerce, enables customers to establish and execute complex digital commerce strategies that include global expansion, multi-brand rollouts and omni-channel operations. The Company’s customers use its highly scalable, secure and open Demandware Commerce platform to create a seamless brand experience for consumers across all digital touch points globally. The Company sells subscriptions to its software and related services through both a direct sales force and indirect channels. The Company’s current customers consist of retailers and branded manufacturers that operate principally in the following vertical markets: apparel and footwear, health and beauty, home and garden, sporting goods, general merchandise and other categories. The Company’s headquarters are located in Burlington, Massachusetts. At March 31, 2014, the Company had eight subsidiaries: Demandware Securities Corporation, Mainstreet Commerce LC, Demandware GmbH, Demandware UK Limited, Demandware SARL and Demandware Hong Kong Limited, each of which is wholly owned by the Company, and Demandware E-Commerce (Shanghai) Limited and Demandware Australia Pty Limited, each of which is a wholly owned subsidiary of Demandware Hong Kong Limited. Public Stock Offering—In November 2013, the Company closed a follow-on offering of the sale of 3,310,098 shares of its common stock, including 810,098 shares of its common stock owned by certain shareholders, at an offering price of $57.00 per share. In December 2013, the Company sold an additional 496,515 shares of its common stock pursuant to the underwriters’ option to purchase additional shares, at a price of $57.00 per share. The Company received proceeds from the public offering of $163.1 million, net of underwriting discounts and commissions, but before offering expenses of $0.5 million. The Company received no proceeds from the sale of its common stock by the selling shareholders. Basis of Presentation and Significant Accounting Policies—The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States (“GAAP”) applicable to interim periods, under the rules and regulations of the United States Securities and Exchange Commission ( “SEC”), and on a basis substantially consistent with the audited consolidated financial statements of the Company as of and for the fiscal year ended December 31, 2013. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, the accompanying unaudited condensed consolidated financial statements contain all adjustments (consisting only of normal recurring adjustments) necessary for a fair presentation of the results of operations for the interim periods reported and of the Company’s financial condition as of the date of the interim balance sheet. The Company considers events or transactions that occur after the balance sheet date but before the financial statements are issued to provide additional information relative to certain estimates or to identify matters that require additional disclosure. Interim results are not necessarily indicative of the results for any other interim period or for the entire year. The condensed consolidated balance sheet at December 31, 2013 has been derived from the audited financial statements at that date, but does not include all of the disclosures required by GAAP. The accompanying condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto contained in the Company’s Annual Report on Form 10-K filed with the SEC on March 3, 2014. Recent Accounting Pronouncements—Effective January 1, 2014, the Company adopted Accounting Standards Update (“ASU”) No. 2013-11, “Presentation of a Liability for an Unrecognized Tax Benefit When a Net Operating Loss or Tax Credit Carryforward Exists.” This accounting update requires that an unrecognized tax benefit be presented as a reduction of a deferred tax asset for a net operating loss (“NOL”) carryforward or other tax credit carryforward when settlement in this manner is available under applicable tax law. The adoption of this guidance did not have a material impact on the Company’s consolidated financial position, results of operations or cash flows.

1. ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Company Overview—Demandware, Inc. (the “Company”) provides enterprise-class cloud-based digital commerce solutions that enable companies to easily design, implement and manage their own customized digital commerce sites, including websites, mobile applications, in-store solutions and other digital storefronts. The Company’s digital commerce platform, Demandware Commerce, enables customers to establish and execute complex digital commerce strategies that include global expansion, multi-brand rollouts and omni-channel operations. The Company’s customers use its highly scalable, secure and open Demandware Commerce platform to create a seamless brand experience for consumers across all digital touch points globally.

The Company sells subscriptions to its software and related services through both a direct sales force and indirect channels. The Company’s current customers consist of retailers and branded manufacturers that operate principally in the following vertical markets: apparel and footwear, health and beauty, home and garden, sporting goods, general merchandise and other categories.

The Company’s headquarters are located in Burlington, Massachusetts. At March 31, 2014, the Company had eight subsidiaries: Demandware Securities Corporation, Mainstreet Commerce LC, Demandware GmbH, Demandware UK Limited, Demandware SARL and Demandware Hong Kong Limited, each of which is wholly owned by the Company, and Demandware E-Commerce (Shanghai) Limited and Demandware Australia Pty Limited, each of which is a wholly owned subsidiary of Demandware Hong Kong Limited.

Public Stock Offering—In November 2013, the Company closed a follow-on offering of the sale of 3,310,098 shares of its common stock, including 810,098 shares of its common stock owned by certain shareholders, at an offering price of $57.00 per share. In December 2013, the Company sold an additional 496,515 shares of its common stock pursuant to the underwriters’ option to purchase additional shares, at a price of $57.00 per share. The Company received proceeds from the public offering of $163.1 million, net of underwriting discounts and commissions, but before offering expenses of $0.5 million. The Company received no proceeds from the sale of its common stock by the selling shareholders.

Basis of Presentation and Significant Accounting Policies—The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States (“GAAP”) applicable to interim periods, under the rules and regulations of the United States Securities and Exchange Commission ( “SEC”), and on a basis substantially consistent with the audited consolidated financial statements of the Company as of and for the fiscal year ended December 31, 2013. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, the accompanying unaudited condensed consolidated financial statements contain all adjustments (consisting only of normal recurring adjustments) necessary for a fair presentation of the results of operations for the interim periods reported and of the Company’s financial condition as of the date of the interim balance sheet. The Company considers events or transactions that occur after the balance sheet date but before the financial statements are issued to provide additional information relative to certain estimates or to identify matters that require additional disclosure. Interim results are not necessarily indicative of the results for any other interim period or for the entire year.

The condensed consolidated balance sheet at December 31, 2013 has been derived from the audited financial statements at that date, but does not include all of the disclosures required by GAAP. The accompanying condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto contained in the Company’s Annual Report on Form 10-K filed with the SEC on March 3, 2014.

Recent Accounting Pronouncements—Effective January 1, 2014, the Company adopted Accounting Standards Update (“ASU”) No. 2013-11, “Presentation of a Liability for an Unrecognized Tax Benefit When a Net Operating Loss or Tax Credit Carryforward Exists.” This accounting update requires that an unrecognized tax benefit be presented as a reduction of a deferred tax asset for a net operating loss (“NOL”) carryforward or other tax credit carryforward when settlement in this manner is available under applicable tax law. The adoption of this guidance did not have a material impact on the Company’s consolidated financial position, results of operations or cash flows.