pre_text: Stock options The following tables summarize our stock option activities and related information: (1) The aggregate intrinsic value represents the excess of the closing price of our common stock of $6.87 as of December 31, 2019 over theexercise price of the outstanding in-the-money options.
table: Number of Shares (thousands) Weighted-Average Exercise Price Weighted-Average Remaining Contractual Term (years) Aggregate Intrinsic Value(1) (thousands)
table: Outstanding as of December 31, 2018 4,674 $5.19
table: Granted — $ —
table: Exercised (842) $2.84
table: Canceled (130) $9.41
table: Outstanding as of December 31, 2019 3,702 $5.57 3.52 $6,395
table: Vested and exercisable as of December 31, 2019 3,427 $5.49 3.56 $6,210
question: Analyse this data from a financial earnings document. What is difference on the aggregate intrinsic value between Outstanding and Vested and exercisable as of December 31, 2019?