Nature of Operations and Summary of Significant Accounting Policies	6 Months Ended
Jun. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Operations and Summary of Significant Accounting Policies	Nature of Operations and Summary of Significant Accounting Policies Description of Business Trupanion, Inc. (collectively with its wholly-owned subsidiaries, the Company) is a direct-to-consumer monthly subscription service provider of a medical plan for cats and dogs throughout the United States, Canada and Puerto Rico. Basis of Presentation The consolidated balance sheet data as of December 31, 2014 was derived from audited consolidated financial statements. The accompanying unaudited consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (U.S. GAAP) for unaudited consolidated financial information. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete financial statements. The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation. These unaudited consolidated financial statements and notes should be read in conjunction with the Company’s audited consolidated financial statements and accompanying notes for the year ended December 31, 2014 included in the Company’s Annual Report on Form 10-K, filed with the U.S Securities and Exchange Commission on February 24, 2015. The accompanying unaudited consolidated financial statements reflect all adjustments consisting of normal recurring adjustments which, in the opinion of management, are necessary for a fair presentation of the Company’s financial position and results of its operations, as of and for the periods presented. Operating results for the three and six months ended June 30, 2015 are not necessarily indicative of the results that may be expected for the year ending December 31, 2015, or for any other period. Reclassifications Certain prior year amounts have been reclassified within the Company’s consolidated financial statements from their original presentation to conform to the current period presentation. In addition, amounts in note 8 related to segments have been recast to reflect a change in the composition of the Company’s segments as described in note 8. Use of Estimates The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingencies and the reported amounts of revenue and expenses. Significant items subject to such estimates and assumptions include the valuation of deferred tax assets, stock-based compensation, claims reserve and useful lives of software developed for internal use. Actual results could differ from the estimates used in preparing the consolidated financial statements. Advertising Advertising costs are expensed as incurred, with the exception of television advertisements, which are expensed the first time advertisement is aired. Accumulated Other Comprehensive Loss There were no reclassifications out of accumulated other comprehensive loss during the three and six months ended June 30, 2015 and 2014. Insurance Operations Effective January 1, 2015, the Company formed a segregated account in Bermuda as part of Wyndham Insurance Company (SAC) Limited (WICL), and entered into a revised fronting and reinsurance arrangement with Omega General Insurance Company (Omega) to include its newly formed segregated account. The Company maintains all risk with the business written in Canada and consolidates the entity in its financial statements. Contractual requirements restrict dividends from this entity until after 2016, at which time dividends will be allowed subject to the Segregated Accounts Company Act of 2000, which allows for dividends only to the extent that the entity remains solvent and the value of its assets remain greater than the aggregate of its liabilities and its issued share capital and share premium accounts. Recent Accounting Pronouncements In May 2014, the Financial Accounting Standards Board (FASB) issued an Accounting Standard Update (ASU) amending revenue recognition guidance and requiring more detailed disclosures to enable users of financial statements to understand the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. Insurance contracts are excluded from the scope of this new guidance. The guidance is effective for annual and interim reporting periods beginning after December 15, 2017, with early adoption prohibited, and must be applied retrospectively or modified retrospectively. The Company does not believe this ASU will have a material impact on its consolidated financial statements. In May 2015, the FASB issued an ASU amending short-term insurance contracts disclosures and requiring more detailed disclosures to enable users of financial statements to understand information relating to liabilities for unpaid claims and claims adjustment expenses. Additionally, the amendments will also require insurance entities to disclose information about significant changes in methodologies and assumptions used to calculate these liabilities. This guidance is effective for annual reporting periods beginning after December 15, 2015 and interim periods beginning after December 15, 2016. Early adoption of this guidance is permitted, and must be applied retrospectively by providing comparative disclosures for each period presented. We plan to adopt this guidance in 2016.

Nature of Operations and Summary of Significant Accounting Policies

Description of Business

Trupanion, Inc. (collectively with its wholly-owned subsidiaries, the Company) is a direct-to-consumer monthly subscription service provider of a medical plan for cats and dogs throughout the United States, Canada and Puerto Rico.

Basis of Presentation

The consolidated balance sheet data as of December 31, 2014 was derived from audited consolidated financial statements. The accompanying unaudited consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (U.S. GAAP) for unaudited consolidated financial information. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete financial statements. The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation. These unaudited consolidated financial statements and notes should be read in conjunction with the Company’s audited consolidated financial statements and accompanying notes for the year ended December 31, 2014 included in the Company’s Annual Report on Form 10-K, filed with the U.S Securities and Exchange Commission on February 24, 2015. The accompanying unaudited consolidated financial statements reflect all adjustments consisting of normal recurring adjustments which, in the opinion of management, are necessary for a fair presentation of the Company’s financial position and results of its operations, as of and for the periods presented. Operating results for the three and six months ended June 30, 2015 are not necessarily indicative of the results that may be expected for the year ending December 31, 2015, or for any other period.

Reclassifications

Certain prior year amounts have been reclassified within the Company’s consolidated financial statements from their original presentation to conform to the current period presentation. In addition, amounts in note 8 related to segments have been recast to reflect a change in the composition of the Company’s segments as described in note 8.

Use of Estimates

The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingencies and the reported amounts of revenue and expenses. Significant items subject to such estimates and assumptions include the valuation of deferred tax assets, stock-based compensation, claims reserve and useful lives of software developed for internal use. Actual results could differ from the estimates used in preparing the consolidated financial statements.

Advertising

Advertising costs are expensed as incurred, with the exception of television advertisements, which are expensed the first time advertisement is aired.

Accumulated Other Comprehensive Loss

There were no reclassifications out of accumulated other comprehensive loss during the three and six months ended June 30, 2015 and 2014.

Insurance Operations

Effective January 1, 2015, the Company formed a segregated account in Bermuda as part of Wyndham Insurance Company (SAC) Limited (WICL), and entered into a revised fronting and reinsurance arrangement with Omega General Insurance Company (Omega) to include its newly formed segregated account. The Company maintains all risk with the business written in Canada and consolidates the entity in its financial statements. Contractual requirements restrict dividends from this entity until after 2016, at which time dividends will be allowed subject to the Segregated Accounts Company Act of 2000, which allows for dividends only to the extent that the entity remains solvent and the value of its assets remain greater than the aggregate of its liabilities and its issued share capital and share premium accounts.

Recent Accounting Pronouncements

In May 2014, the Financial Accounting Standards Board (FASB) issued an Accounting Standard Update (ASU) amending revenue recognition guidance and requiring more detailed disclosures to enable users of financial statements to understand the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. Insurance contracts are excluded from the scope of this new guidance. The guidance is effective for annual and interim reporting periods beginning after December 15, 2017, with early adoption prohibited, and must be applied retrospectively or modified retrospectively. The Company does not believe this ASU will have a material impact on its consolidated financial statements.

In May 2015, the FASB issued an ASU amending short-term insurance contracts disclosures and requiring more detailed disclosures to enable users of financial statements to understand information relating to liabilities for unpaid claims and claims adjustment expenses. Additionally, the amendments will also require insurance entities to disclose information about significant changes in methodologies and assumptions used to calculate these liabilities. This guidance is effective for annual reporting periods beginning after December 15, 2015 and interim periods beginning after December 15, 2016. Early adoption of this guidance is permitted, and must be applied retrospectively by providing comparative disclosures for each period presented. We plan to adopt this guidance in 2016.