A court's determination as to its jurisdiction is a conclusion of law, which is reviewed de novo. Bunch v. Lancair Intl., Inc., 2009 MT 29, ¶ 15, 349 Mont. 144, 202 P.3d 784; Stanley v. Lemire, 2006 MT 304, ¶ 52, 334 Mont. 489, 148 P.3d 643. A court may address the question of its jurisdiction sua sponte. Stanley, ¶ 32.