Grant Green plays jazz guitar, and in bebop there are not many of those. Idle moments is a record he made in 1963, released in 1965. When he started with Blue Note, he was nervous and not very sure of himself. The result from 1961 was only released in 2001 as First session. Looking at the list of musicians he is supposed to lead, I can imagine his fear: Wynton Kelly on piano, Paul Chambers on bass and Philly Joe Jones on drums. Not exactly regular Joes.
For this record he recorded pianist Pearson’s Idle moments. The song should have taken under ten minutes, but due to confusion about the length of the chorus due to a repeating melody, it was taking way longer. Blue Note’s producer Alfred Lion tried to record a shorter take, but the longer version just felt better. The length of that song caused two other songs to be shorter than was originally intended though. The originals are added in the CD version (and here in the Spotify link) as alternate takes.