Generally, a final judgment is a decision by the court that terminates the litigation on the merits and leaves the lower court with nothing to do other than execute the judgment (Dandong v. Pinnacle Performance Ltd., , at *8 (S.D.N.Y. Dec. 12, 2011)). Under the collateral order doctrine, however, parties may appeal interlocutory rulings before a final judgment if the parties would lose their rights without an immediate appeal (Dandong, , at *8).
Under the collateral order doctrine, parties may appeal interlocutory rulings only if the order:
Conclusively determines the disputed question.
Resolves an important issue completely separate from the merits of the action.
Would be unreviewable on appeal from a final judgment.