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