Unable to access javaScript generated data with selenium and headless FireFox.

[pjn4]

There is a table that is being rendered by javaScript on the page. I would like to retrieve that data in my python code. Below I have include
1. Python Code
2. Relavent HTML
3. The things that I have tried.

1. Python Code

from selenium.webdriver import Firefox
from selenium.webdriver.firefox.options import Options
opts = Options()
opts.set_headless()
assert opts.headless  # Operating in headless mode
browser = Firefox(options=opts)

url="https://www.sec.gov/cgi-bin/viewer?action=view&cik=1596532&accession_number=0001596532-19-000027&xbrl_type=v#"
browser.get(url)

## first click 
link1=browser.find_elements_by_link_text("Financial Statements")
link1[0].click()
## See below for what I have tried here

## second click 
link2=browser.find_elements_by_link_text("Consolidated Balance Sheets")
link2[0].click()

## See below for what I have tried here

browser.save_screenshot("file.png")
## file.png had the correct data so I know that the clicks are working correctly
## 
browser.close()
quit()

2. Relavent HTML code
# This is the HTML from the initial URL

!-- cover_category = 0 -->    <li class="accordion">
      <a id="menu_cat1" href="#">Cover</a>
      <ul>
            <li class="accordion" id="r1" ><a class="xbrlviewer" onClick="javascript:highlight(\
this);" href="javascript:loadReport(1);">Document and Entity Information</a></li>
      </ul>
    </li>
    <li class="accordion">
      <a id="menu_cat2" href="#">Financial Statements</a>
      <ul>
            <li class="accordion" id="r2" ><a class="xbrlviewer" onClick="javascript:highlight(\
this);" href="javascript:loadReport(2);">Consolidated Balance Sheets</a></li>
            <li class="accordion" id="r3" ><a class="xbrlviewer" onClick="javascript:highlight(\
this);" href="javascript:loadReport(3);">Consolidated Balance Sheets (Parenthetical)</a></li>
            <li class="accordion" id="r4" ><a class="xbrlviewer" onClick="javascript:highlight(\
this);" href="javascript:loadReport(4);">Consolidated Statements of Income</a></li>
            <li class="accordion" id="r5" ><a class="xbrlviewer" onClick="javascript:highlight(\
this);" href="javascript:loadReport(5);">Consolidated Statements of Comprehensive Income</a></l\
i>
            <li class="accordion" id="r6" ><a class="xbrlviewer" onClick="javascript:highlight(\
this);" href="javascript:loadReport(6);">Consolidated Statements of Stockholders' Equity</a></l\
i>
            <li class="accordion" id="r7" ><a class="xbrlviewer" onClick="javascript:highlight(\
this);" href="javascript:loadReport(7);">Consolidated Statements of Cash Flows</a></li>
      </ul>
    </li>

3. what I have tried both after click1 and click2

data = browser.execute_script("javascript:loadReport(2)" )
result None

data = browser.execute_script("loadReport(2)" )

returns:
<selenium.webdriver.firefox.webelement.FirefoxWebElement (session="70cabf50-eee7-486f-829c-1d4e9b0e0dfe", element="b3a93cc8-6b8f-431c-a117-3fcb97456631")>

data= browser.find_element_by_link_text("Consolidated Balance Sheets")

returns None

---

I guess I should have played a little more before asking for help
after the second click
data=browser.page_source does the trick