I would like to inquire about the following points related to "touch base":
- Is "touch base" an idiom?
- Is it formal or informal? For example, in a work environment when the boss say to his employee:
I would like to touch base with you. In this case, is it formal or informal.
- Can it be used convey good news or bad new? For example:
The teacher would like to touch base with her students to reward him or punish him.