Idelalisib Terminated Phase N/A Trials for Recurrent Indolent Adult Non-Hodgkin Lymphoma / Indolent Adult Non-Hodgkin Lymphoma / chronic, recurrent Lymphocytic Leukemia / Digestive System Signs and Symptoms / Absence of Signs or Symptoms / Recurrent B-Cell Non-Hodgkin Lymphoma / Recurrent Small Lymphocytic Lymphoma / B-cell Non-Hodgkin's Lymphomas Basic Science