 To compare the long-term efficacy, subject compliance, and subject satisfaction of percutaneous tibial nerve stimulation PTNS therapy versus transcutaneous electrical sacral nerve stimulation TENS for the treatment of subjects with idiopathic overactive bladder. Previous short-term studies suggest that these therapies have equal efficacy in improving OAB symptoms, but we hypothesize that long-term efficacy and success is actually higher in the TENS group due to ease of use, since subjects can self-administer this therapy. Secondary goals are to evaluate subject quality of life improvement scores, bladder diary scores change in the frequency of urination, and changes in urodynamic studies while undergoing these therapies. 