Subsequent Events	9 Months Ended
Subsequent Events	Sep. 30, 2021
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events As described above in Note 1, the Company and Lemonade have entered into the Agreement, pursuant to which Lemonade will acquire the Company in an all-stock transaction that implies a fully diluted equity value of approximately $500 million, or an enterprise value of about $340 million net of unrestricted cash and cash equivalents as of September 30, 2021. In accordance with the Agreement, at the First Effective Time, each share of the Company’s common stock issued and outstanding immediately prior to the First Effective Time will be converted into the right to receive 0.05263 (the “Exchange Ratio”) validly issued, fully paid and non-assessable shares of common stock of Lemonade, par value $0.00001 per share (“Lemonade Common Stock”). At the First Effective Time, (i) each Metromile stock option that is held by an individual who, as of November 8, 2021, was not employed or providing services to the Company or its subsidiaries shall be cancelled and converted into the right to receive an amount in cash, without interest, equal to (A) (1) the Lemonade stock price multiplied by the Exchange Ratio (the “Per Metromile Share Price”) less (2) the per share exercise price thereof, multiplied by (B) the total number of shares of the Company’s common stock subject to such option; (ii) each other Company stock option shall be assumed by Lemonade and converted into a corresponding option with respect to Lemonade Common Stock (with the number of shares and exercise price thereof equitably adjusted based on the Exchange Ratio); (iii) each award of Company restricted stock units that (A) is held by any non-employee director of the Company or (B) subject to performance vesting conditions shall be cancelled and converted into the right to receive an amount in cash, without interest, equal to (1) the Per Metromile Share Price multiplied by (2) the number of shares of the Company’s common stock subject to such award (in the case of any award subject to performance vesting conditions, based on actual performance as determined by the Compensation Committee of the Company’s Board of Directors prior to the First Effective Time); (iv) each other award of Company restricted stock units shall be assumed by Lemonade and converted into a corresponding award with respect to Lemonade Common Stock (with the number of shares subject to such award equitably adjusted based on the Exchange Ratio); and (v) each Metromile warrant exercisable for shares of the Company’s common stock shall be assumed by Lemonade and converted into a corresponding warrant denominated in shares of Lemonade Common Stock (with the number of warrants and exercise price being adjusted based on the Exchange Ratio). Except as otherwise set forth above, each Metromile stock option, restricted stock unit award, and warrant assumed by Lemonade shall continue to have the same terms and conditions as applied immediately prior to the First Effective Time. The consummation of the Proposed Transaction is subject to the satisfaction or waiver of certain closing conditions, including, among others (i) the effectiveness of the registration statement on Form S-4 registering the shares of Lemonade Common Stock issuable in the Proposed Transaction and absence of any stop order or proceedings by the SEC with respect thereto; (ii) the adoption of the Agreement by holders of a majority of the outstanding shares of the Company’s common stock; (iii) the expiration or earlier termination of any applicable waiting period of review under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended; (iv) receipt of other material regulatory consents and approvals; (v) the approval for listing on the New York Stock Exchange of the shares of Lemonade Common Stock to be issued pursuant to the Agreement; (vi) the absence of governmental restraints or prohibitions preventing the consummation of the Proposed Transaction; (vii) subject to specified materiality standards, the truth and accuracy of the representations and warranties made by each party; (viii) the compliance with or performance by the other party in all material respects of the covenants in the Agreement; and (ix) the absence of a material adverse effect on each party. Contemporaneously with the execution of the Agreement, certain stockholders of the Company holding approximately 11.3% of the outstanding shares of the Company’s common stock, including all members of the Company’s Board of Directors and certain of the Company’s officers (the “Stockholders”), entered into voting and support agreements (the “Voting and Support Agreements”) with Lemonade, pursuant to which the Stockholders agreed to, among other things, vote all of their shares in the Company (“Voting Shares”) (i) in favor of the adoption of the Agreement and approval of the Proposed Transaction; (ii) in favor of any adjournment or postponement recommended by the Company with respect to any Company stockholders meeting to the extent permitted or required pursuant to the Agreement; (iii) against any alternative acquisition proposal or transaction; (iv) against any merger, sale of substantial assets or liquidation of the Company; and (v) against any proposal, action or agreement that would reasonably be expected to impede, interfere with, delay or postpone, prevent or otherwise impair the Proposed Transaction. Upon the consummation of the Proposed Transaction, the Company will cease to be a publicly traded company. The Company has agreed to various customary covenants and agreements, including, among others, agreements to conduct business in the ordinary course during the period between the execution of the agreement and the effective time of the Proposed Transaction. The Company does not believe these restrictions will impact the Company’s ability to meet its ongoing costs of operations, working capital needs, or capital expenditure requirements.