Idelalisib Recruiting Phase 2 Trials for Transformed Lymphoma / Lymphoplasmacytic Lymphoma / Lymphoma, B-Cell / Small Lymphocytic Lymphoma (SLL) / Waldenström's Macroglobulinemia (WM) / Non Hodgkin Lymphoma (NHL) / Indolent Lymphoma / Follicular Lymphoma (FL) / Marginal Zone Lymphoma Treatment