Python Stale element in selenium

Code
from selenium import webdriver

from selenium.common.exceptions import StaleElementReferenceException

from selenium.webdriver.common.action_chains import ActionChains

import time

from selenium.webdriver.chrome.options import Options

from selenium.webdriver.common.by import By

from selenium.webdriver.common.keys import Keys

from selenium.webdriver.support.select import Select

from selenium.webdriver.support.wait import WebDriverWait

from selenium.webdriver.support import expected_conditions as EC

browser_options = Options()

browser_options.add_argument('--user-agent="Mozilla/5.0 (Windows NT 4.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/37.0.2049.0 Safari/537.36"')

browser_options.add_argument('start-maximized')

browser = webdriver.Chrome(executable_path='C:/bin/chromedriver.exe',options=browser_options)

browser.get('https://sanctionssearch.ofac.treas.gov/default.aspx')

search_box = WebDriverWait(browser, 10).until(EC.element_to_be_clickable((By.XPATH, '//*[@id="ctl00_MainContent_txtLastName"]')))

search_box.send_keys('Saleem')

search_box.send_keys(Keys.ENTER)

time.sleep(4)

buttons_list = []

try:

    results = browser.find_element_by_xpath('//*[@id="gvSearchResults"]/tbody').find_elements_by_tag_name('td')

    for result in results:

        buttons = result.find_elements_by_id('btnDetails')

        for button in buttons:

            buttons_list.append(button)

            

    for item in buttons_list:

        item.click()

        time.sleep(5)

        browser.back()

        browser.refresh()

finally:

    browser.quit()