For the Years Ended December 31,

2020

2019

2018

Numerator:

Net Income available to common stockholders for basic net income per common share

$

131

$

914

$

1,176

Effect of interest on assumed conversions of convertible notes, net of tax

8

7

—

Net Income available to common stockholders for dilutive net income per common share

$

139

$

921

$

1,176

Denominator:

Weighted average common shares outstanding for basic net income per common share

4,330

4,501

4,462

Weighted average impact of assumed convertible notes

30

28

—

Weighted average impact of dilutive equity instruments

69

87

99

Weighted average shares for diluted net income per common share

4,429

4,616

4,561

Net income per common share:

Basic

$

0.03

$

0.20

$

0.26

Diluted

$

0.03

$

0.20

$

0.26