Table:
|  | Year Ended December 31, |  | Change |  |
| --- | --- | --- | --- | --- |
|  | 2019 | 2018 | $ | % |
|  |  | (dollars in thousands) |  |  |
| Other expense, net | $ 4,597 | $ 4,628 | $ (31) | (0.7)% |
| % of revenue | 2% | 3% |  |  |
Paragraphs:
Other Income (Expense), Net
Other expense, net decreased by $31 thousand in 2019 compared to 2018 as a result of the recognition of a $1.4 million loss on extinguishment related to the partial repurchase of our 2022 Notes and a $1.1 million increase in interest expense related to our convertible senior notes, offset by an increase of $2.7 million of interest income earned on our investment as a result of proceeds invested from our convertible note and common stock offerings.
Question:
What was the increase in interest income?
Answer: $2.7 million