something small and unimportant
picayune - petty
If something is ‘picayune’ then it is regarded as being so small, trivial, and unimportant that it’s not worth getting into or being concerned about. A good way to remember how to accurately use ‘picayune’ is to think of the word ‘picky’. It is most commonly used in written English, particularly in the media.
However picayune it may seem to others, I always look for basic good manners in a job candidate.
When trying to resolve the discrepancy in the accounts, don’t overlook anything. Even the most seemingly picayune detail could be key.
Why are you focusing on such picayune things? You need to look at the broader picture.