You could add a password which should lock the document;
then when the receiver reads the document, he should be able to
copy it to his machine, make any additions & send back to you;
then you can make the changes to the table & re-send/upload.
I don't know the details as to how this would work;
whenever I upload anything, I always click on 'only those with
the link' can open which keeps prying roving eyes from seeing.
Hoping this helps to some degree,