THOUSAND OAKS, Calif. (AP) — THOUSAND OAKS, Calif. (AP) — Atara Biotherapeutics Inc. (ATRA) on Tuesday reported a loss of $2.2 million in its third quarter. The Thousand Oaks, California-based company said it had a loss of 15 cents per share. The drug developer posted revenue of $1.2 million in the period. Atara Biotherapeutics shares...