Summary of business and significant accounting policies	9 Months Ended
Oct. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Summary of business and significant accounting policies	Summary of business and significant accounting policies HealthEquity, Inc. was incorporated in the state of Delaware on September 18, 2002, and was organized to offer a full range of innovative solutions for managing health care accounts (Health Savings Accounts, Health Reimbursement Arrangements, and Flexible Spending Accounts) for health plans, insurance companies, and third-party administrators. Principles of consolidation—The condensed consolidated financial statements include the accounts of HealthEquity, Inc. and its wholly owned subsidiaries, First HSA, LLC, First Horizon MSaver, Inc., HEQ Insurance Services, Inc., and HealthEquity Advisors, LLC (collectively referred to as the "Company"). All significant intercompany balances and transactions have been eliminated. Basis of presentation—The accompanying condensed consolidated financial statements as of October 31, 2014 and for the three and nine months ended October 31, 2014 and 2013 are unaudited and have been prepared in conformity with accounting principles generally accepted in the United States of America ("GAAP") and the applicable rules and regulations of the Securities and Exchange Commission ("SEC") regarding interim financial reporting. In the opinion of management, the interim data includes all adjustments, consisting only of normal recurring adjustments, necessary for a fair presentation of the results for the interim periods. Certain information and note disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. Therefore, these condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in the Company's final prospectus (dated July 30, 2014) filed with the SEC pursuant to Rule 424(b) under the Securities Act of 1933 on August 1, 2014. The fiscal year-end condensed consolidated balance sheet data was derived from audited financial statements, but does not include all disclosures required by GAAP. Initial public offering—On August 5, 2014, the Company consummated its initial public offering ("IPO") and issued and sold 10,465,000 shares of its common stock at a public offering price of $14.00 per share, less the underwriters' discount. The Company received net proceeds of approximately $132.6 million after deducting underwriters' discounts and commissions of approximately $10.2 million and other offering expenses payable by the Company of approximately $3.7 million. The underwriting discounts and commissions and other offering expenses were recorded as an offset against the IPO proceeds in additional paid-in capital upon the closing of the IPO on August 5, 2014. Capital structure—On July 14, 2014, the Company's board of directors approved an amended and restated certificate of incorporation, pursuant to which the total number of shares of all classes of capital stock that the Company is authorized to issue is 1,000,000,000 shares, including 900,000,000 shares of common stock and 100,000,000 shares of preferred stock, par value $0.0001 per share. The amended and restated certificate of incorporation was filed with the Secretary of State of the State of Delaware and became effective on August 5, 2014. On July 14, 2014, the Company's board of directors declared a cash dividend in an aggregate amount of $50.0 million on shares of the Company's common stock outstanding on August 4, 2014 (after giving effect to the conversion of all outstanding convertible preferred stock and redeemable convertible preferred stock into shares of common stock). The terms of each of the Company's stock plans, including the 2003 Director Stock Plan, 2003 Stock Plan, 2005 Stock Plan, 2006 Stock Plan, 2009 Stock Plan and the 2014 Equity Incentive Plan (the "Incentive Plan") requires an adjustment to outstanding stock options to prevent dilution of the holders’ interests as a result of the foregoing special dividend. Accordingly, the Company's board of directors approved an adjustment to reduce the exercise price of each of the stock options outstanding as of the record date, August 4, 2014, for the dividend by $1.00. As of the close of business on August 4, 2014, all of the Company's redeemable convertible preferred stock and convertible preferred stock converted into 32,486,588 shares of common stock. Recent accounting pronouncements—On May 28, 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2014-09, Revenue from Contracts with Customers, which requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The ASU will replace most existing revenue recognition guidance in GAAP when it becomes effective. The new standard is effective for our annual and interim reporting periods beginning February 1, 2017. Early application is not permitted. The standard permits the use of either the retrospective or cumulative effect transition method. The Company is evaluating the effect that ASU 2014-09 will have on the consolidated financial statements and related disclosures. The Company has not yet selected a transition method nor determined the effect of the standard on the ongoing financial reporting. Revision of previously issued financial statements—In the three months ended October 31, 2014, the Company identified an error that originated in the three months ended July 31, 2014. This error was caused by using an incorrect fair value amount in calculating the windfall tax benefit for a portion of the vested options exercised during the period. The adjustment increased prepaid expenses and additional paid-in capital by approximately $1.0 million. The error also decreased cash provided by operating activities by $1.0 million and increased cash provided by financing activities by the same amount. The error had no impact to the condensed consolidated statement of operations and comprehensive income. The correction has been properly reflected in both the condensed consolidated balance sheets as of October 31, 2014, and in the condensed consolidated statements of cash flows for the nine months ended October 31, 2014. The Company determined this error did not materially impact the July 31, 2014 financial statements nor the October 31, 2014 financial statements; however, in order to correctly present the financial statements, the July 31, 2014 financial statements will be revised the next time the financial statements are filed to reflect this correction.

Summary of business and significant accounting policies

HealthEquity, Inc. was incorporated in the state of Delaware on September 18, 2002, and was organized to offer a full range of innovative solutions for managing health care accounts (Health Savings Accounts, Health Reimbursement Arrangements, and Flexible Spending Accounts) for health plans, insurance companies, and third-party administrators.

Principles of consolidation—The condensed consolidated financial statements include the accounts of HealthEquity, Inc. and its wholly owned subsidiaries, First HSA, LLC, First Horizon MSaver, Inc., HEQ Insurance Services, Inc., and HealthEquity Advisors, LLC (collectively referred to as the "Company"). All significant intercompany balances and transactions have been eliminated.

Basis of presentation—The accompanying condensed consolidated financial statements as of October 31, 2014 and for the three and nine months ended October 31, 2014 and 2013 are unaudited and have been prepared in conformity with accounting principles generally accepted in the United States of America ("GAAP") and the applicable rules and regulations of the Securities and Exchange Commission ("SEC") regarding interim financial reporting. In the opinion of management, the interim data includes all adjustments, consisting only of normal recurring adjustments, necessary for a fair presentation of the results for the interim periods. Certain information and note disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. Therefore, these condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in the Company's final prospectus (dated July 30, 2014) filed with the SEC pursuant to Rule 424(b) under the Securities Act of 1933 on August 1, 2014.

The fiscal year-end condensed consolidated balance sheet data was derived from audited financial statements, but does not include all disclosures required by GAAP.

Initial public offering—On August 5, 2014, the Company consummated its initial public offering ("IPO") and issued and sold 10,465,000 shares of its common stock at a public offering price of $14.00 per share, less the underwriters' discount. The Company received net proceeds of approximately $132.6 million after deducting underwriters' discounts and commissions of approximately $10.2 million and other offering expenses payable by the Company of approximately $3.7 million. The underwriting discounts and commissions and other offering expenses were recorded as an offset against the IPO proceeds in additional paid-in capital upon the closing of the IPO on August 5, 2014.

Capital structure—On July 14, 2014, the Company's board of directors approved an amended and restated certificate of incorporation, pursuant to which the total number of shares of all classes of capital stock that the Company is authorized to issue is 1,000,000,000 shares, including 900,000,000 shares of common stock and 100,000,000 shares of preferred stock, par value $0.0001 per share. The amended and restated certificate of incorporation was filed with the Secretary of State of the State of Delaware and became effective on August 5, 2014.

On July 14, 2014, the Company's board of directors declared a cash dividend in an aggregate amount of $50.0 million on shares of the Company's common stock outstanding on August 4, 2014 (after giving effect to the conversion of all outstanding convertible preferred stock and redeemable convertible preferred stock into shares of common stock). The terms of each of the Company's stock plans, including the 2003 Director Stock Plan, 2003 Stock Plan, 2005 Stock Plan, 2006 Stock Plan, 2009 Stock Plan and the 2014 Equity Incentive Plan (the "Incentive Plan") requires an adjustment to outstanding stock options to prevent dilution of the holders’ interests as a result of the foregoing special dividend. Accordingly, the Company's board of directors approved an adjustment to reduce the exercise price of each of the stock options outstanding as of the record date, August 4, 2014, for the dividend by $1.00.

As of the close of business on August 4, 2014, all of the Company's redeemable convertible preferred stock and convertible preferred stock converted into 32,486,588 shares of common stock.

Recent accounting pronouncements—On May 28, 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2014-09, Revenue from Contracts with Customers, which requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The ASU will replace most existing revenue recognition guidance in GAAP when it becomes effective. The new standard is effective for our annual and interim reporting periods beginning February 1, 2017. Early application is not permitted. The standard permits the use of either the retrospective or cumulative effect transition method. The Company is evaluating the effect that ASU 2014-09 will have on the consolidated financial statements and related disclosures. The Company has not yet selected a transition method nor determined the effect of the standard on the ongoing financial reporting.

Revision of previously issued financial statements—In the three months ended October 31, 2014, the Company identified an error that originated in the three months ended July 31, 2014. This error was caused by using an incorrect fair value amount in calculating the windfall tax benefit for a portion of the vested options exercised during the period. The adjustment increased prepaid expenses and additional paid-in capital by approximately $1.0 million. The error also decreased cash provided by operating activities by $1.0 million and increased cash provided by financing activities by the same amount. The error had no impact to the condensed consolidated statement of operations and comprehensive income. The correction has been properly reflected in both the condensed consolidated balance sheets as of October 31, 2014, and in the condensed consolidated statements of cash flows for the nine months ended October 31, 2014. The Company determined this error did not materially impact the July 31, 2014 financial statements nor the October 31, 2014 financial statements; however, in order to correctly present the financial statements, the July 31, 2014 financial statements will be revised the next time the financial statements are filed to reflect this correction.