Duke Pearson’s ‘Idle Moments’ was first featured on guitarists Grant Green‘s 1963 album with the same title. Musicians on this nice album include Pearson on piano, Bobby Hutcherson on vibes and Joe Henderson on tenor.
This extra slow, 16 bar, minor key ballad is very straightforward and a good place to begin improvising. The opening vamp runs through the various 7th extensions of C minor. The first section is just II – V – I while the next adds the IV chord and then II – V – IV. IV being the sister chord to I (Link).