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Debt (Tables) | 9 Months Ended
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Sep. 30, 2019
Debt [Abstract] |
Schedule of Interest Information |
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2019 |  | 2018 |  | 2019 |  | 2018
| (in thousands)
Interest expense related to debt, including commitment fees | $ | — |  | $ | — |  | $ | — |  | $ | (257)
Deferred finance cost amortization |  | — |  |  | — |  |  | — |  |  | (191)
Interest income |  | 193 |  |  | 2 |  |  | 581 |  |  | 33
Other interest expense not related to debt |  | — |  |  | 109 |  |  | — |  |  | 142
Interest income (expense), net | $ | 193 |  | $ | 111 |  | $ | 581 |  | $ | (273)
Average effective interest rate, excluding commitment fees |  | 0.00% | (1) |  | 0.00% |  |  | 0.00% | (1) |  | 7.09%
(1)There were no outstanding borrowings during 2019

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