On the same day it granted summary judgment on the merits, the District Court imposed sanctions against the Appellants for their discovery abuses. See
Parsi v. Daioleslam, 286 F.R.D. 73 (D.D.C.2012) (the “Sanctions Order”). On April 9, 2013, the court entered a final judgment in favor of Daioleslam, plus judgment in the amount of $183,480.09 for the sanctions, with post-judgment interest running from the date of the Sanctions Order, which had been entered September 13, 2012. J.A. 926; see also
Parsi v. Daioleslam, 937 F.Supp.2d 44 (D.D.C.2013) (the “Final Order”). In awarding sanctions, the District Court invoked both Rule 37 of the Federal Rules of Civil Procedure and its inherent authority. Parsi, 286 F.R.D. at 77. It noted that Rule 37(a) embraces monetary sanctions for the prevailing party on a motion to compel, and cited to Rule 37(b), which penalizes disobedience of a court order. Id.
(citing FED.R.CIV.P. 37(a), (b)(2)(A)). The court concluded that, under our precedent, it could impose “ ‘issue-related’ sanctions” under its inherent authority based on a finding that a party **166 *120 engaged in misconduct by a preponderance of the evidence, rather than the higher clear and convincing evidence standard. Id.
(quoting Shepherd v. Am. Broadcasting Cos., Inc., 62 F.3d 1469, 1478 (D.C.Cir.1995)). Before reviewing the legal merit of the Appellants' arguments, we summarize the conduct for which the District Court imposed sanctions.