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