The National Organization for Marriage on Monday filed notice to appeal a federal judge’s ruling denying it reimbursement for legal fees to cover the cost of its lawsuit against the Internal Revenue Service over the over the release of confidential tax documents.

In June, a federal court ordered the U.S. government to pay $50,000 to the NOM after the group claimed that confidential donor information from its 2008 tax returns was “leaked” to an activist and later published by the Human Rights Campaign and the Huffington Post.

The court dismissed the majority of the lawsuit, and said the NOM failed to provide any evidence that the disclosure was deliberate and politically motivated.

The NOM subsequently filed a motion seeking $691,000 in attorneys’ fees related to the case. The court denied that request on October 16.

The NOM is appealing that decision to the U.S. Court of Appeals for the Fourth Circuit.