Described herein arc methods of treating non-Hodgkins lymphoma (NHL), wherein the non-Hodgkins lymphoma (NHL) is selected from the group consisting of 1st line, 2nd line, relapsed, refractory, indolent or aggressive non-Hodgkins lymphoma (NHL) follicular lymphoma (FL) chronic lymphocytic leukemia (CLL) marginal zone lymphoma (MZL) diffuse large B-cell lymphoma (DLBCL) mantle cell lymphoma (MCL) transformed lymphoma (TL) and peripheral T-cell lymphoma (PTCL). comprising administering to a patient in need thereof a 2,3-dihydroimidazo[1,2-c] quinazolinc compound, or a salt thereof.