The Ton youngster has been playing on despite a knee complaint - a problem which has forced him to miss training sessions during the week.
And Moore does not expect to discover the extent of the injury until after Falkirk visit Cappielow on Saturday.
Moore said: "Michael Tidser is one who is giving us a bit of a problem at the moment and it has been well documented that he has been having a problem with his knee.
"He is going for a scan on it on Friday. We will not know the extent of it before Saturday and it will be a late call if we play him.
"I think it has been affecting him and affecting his play - especially last Saturday when the pitch was really, really heavy.
"Michael has not been training until a Thursday sometimes, which hasn't been helping him either."