College of idaho, and an Overall smaller than 141 is what average round?
CREATE TABLE "indianapolis_colts_draft_history" (
  "round" real,
  "pick_num" real,
  "overall" real,
  "name" text,
  "position" text,
  "college" text
);
SELECT AVG("round") FROM "indianapolis_colts_draft_history" WHERE "college"='idaho' AND "overall"<141;