. compensation expense in relation to the excess of the fair value of such awards over the amount paid will be recorded over the vesting period . the awards vest over a period of either one and one-half or three years and are restricted as to transferability based on the vesting schedule set forth in the award agreement . the eleven-year promissory notes ( 289581 shares ) were entered into in connection with the loans of approximately $ 1042 made to the company 2019s chief executive officer in 2001