Idiom
spread itself too thinspread (yourself/itself too) thin
1.
to try to do too many different things at the same time.
Max has spread himself thin and needs to focus on just a couple of his best ideas.The company has expanded into many different areas and has probably spread itself too thin.
2.
to not have enough people or equipment to do a job well.
The police are spread thin and cannot provide enough protection.