Summary of Significant Accounting Policies (Policies)	9 Months Ended
Summary of Significant Accounting Policies (Policies)	Sep. 30, 2013
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited condensed financial statements have been prepared in accordance with U.S. generally accepted accounting principles for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. They have been prepared on a basis which assumes that OXiGENE, Inc. (“OXiGENE” or the “Company”) will continue as a going concern, which contemplates the realization of assets and the satisfaction of liabilities and commitments in the normal course of business. The financial statements do not include all of the information and footnotes required by U.S. generally accepted accounting principles for complete financial statements. In the opinion of management, however, all adjustments (consisting primarily of normal recurring accruals) considered necessary for a fair presentation have been included. Operating results for the three and nine months ended September 30, 2013 are not necessarily indicative of the results that may be expected for the year ending December 31, 2013. The balance sheet at December 31, 2012 has been derived from the audited financial statements at that date but does not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. For further information, refer to the financial statements and footnotes thereto included in the Annual Report on Form 10-K for the Company for the year ended December 31, 2012.
Capital Resources	Capital Resources In December 2012, the Company’s board of directors voted unanimously to implement a 1:12 reverse stock split of the Company’s common stock, following authorization of the reverse stock split by a shareholder vote on December 21, 2012. The reverse stock split became effective on December 28, 2012. All of the share and per share amounts discussed and shown in the financial statements and notes have been adjusted to reflect the effect of this reverse stock split. The Company has experienced net losses every year since inception and, as of September 30, 2013 had an accumulated deficit of approximately $236,411,000. The Company expects to incur significant additional operating losses over at least the next several years, principally as a result of its continuing clinical trials and anticipated research and development and manufacturing expenditures. The principal source of the Company’s working capital to date has been the proceeds of private and public equity financings and to a significantly lesser extent the exercise of warrants and stock options. The Company currently has no recurring material amount of licensing or other income. As of September 30, 2013, the Company had approximately $8,797,000 in cash and restricted cash. Based on the Company’s limited ongoing programs and operations, the Company expects its existing cash to support its operations through the third quarter of 2014. However, while this level of cash utilization does not allow for the initiation of any significant projects, including clinical trials, to further the development of the Company’s most advanced product candidates, it does include provisions for initial drug manufacturing activities that the Company has undertaken in connection with the planned filing of a European Marketing Authorization application for ZYBRESTAT^® in anaplastic thyroid cancer, or ATC. Any significant further development of ZYBRESTAT^® or other capital intensive activities will be contingent upon the Company’s ability to raise additional capital in addition to the Company’s existing financing arrangements (as described in detail in Note 2 below). Additional funding may not be available to OXiGENE on acceptable terms, or at all. If the Company is unable to access additional funds when needed, it may not be able to continue the development of its product candidates or the Company could be required to delay, scale back or eliminate some or all of its development programs and other operations. Any additional equity financing, if available to the Company, may not be available on favorable terms, would most likely be dilutive to its current stockholders and debt financing, if available, and may involve restrictive covenants. If the Company accesses funds through collaborative or licensing arrangements, it may be required to relinquish rights to some of its technologies or product candidates that it would otherwise seek to develop or commercialize on its own, on terms that are not favorable to the Company. The Company’s ability to access capital when needed is not assured and, if not achieved on a timely basis, will materially harm its business, financial condition and results of operations. The Company’s ability to raise additional capital could also be impaired if it is unable to comply with the listing standards of The NASDAQ Capital Market and instead has to trade its common shares in the over-the-counter market. These uncertainties create substantial doubt about the Company’s ability to continue as a going concern. The Report of Independent Registered Accounting Firm at the beginning of the Consolidated Financial Statements section of the Company’s Annual Report on Form 10-K for the year ended December 31, 2012 includes a going concern explanatory paragraph. The accompanying financial statements have been prepared on a basis which assumes that the Company will continue as a going concern, which contemplates the realization of assets and the satisfaction of liabilities and commitments in the normal course of business.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of income and expenses during the reporting period. Actual results could differ from those estimates.
Revenue Recognition	Revenue Recognition In December 2011, the Company established a distribution agreement to provide access to ZYBRESTAT^® for the treatment of patients with ATC in certain specified territories on a compassionate use basis. The agreement provides that upon the receipt of ZYBRESTAT^® by the distributor for distribution and sale to compassionate use patients, the distributor has 30 days to inspect the product for defects and to ensure that the product conforms to the warranties made by the Company. If the distributor does not notify the Company of any defective products within the 30-day period it will be deemed to have accepted the products. Revenue is recognized based on products accepted at the conclusion of the 30-day inspection period. Also, the distributor will pay to the Company, on a quarterly basis, an amount equal to 20% of the distributor’s gross margin, as defined in the agreement, on its sales of ZYBRESTAT^® in the preceding quarter, less the cost of introductory drug provided at no cost. This revenue will be recognized upon notification from the distributor of the gross margin earned. ZYBRESTAT^® was expensed at the time it was manufactured, because it is in the development stage and there was not an alternative future use. As a result, the product provided to the distributor has a zero cost basis, and therefore no cost-of-goods-sold has been recorded.

Disclosure of accounting policy for revenue recognition. If the entity has different policies for different types of revenue transactions, the policy for each material type of transaction is generally disclosed. If a sales transaction has multiple element arrangements (for example, delivery of multiple products, services or the rights to use assets) the disclosure may indicate the accounting policy for each unit of accounting as well as how units of accounting are determined and valued. The disclosure may encompass important judgment as to appropriateness of principles related to recognition of revenue. The disclosure also may indicate the entity's treatment of any unearned or deferred revenue that arises from the transaction.

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