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%