Stockholders' Deficit (Tables)
 12 Months Ended
Dec. 31, 2019
Equity [Abstract]  
Summary of Stock Option Activity

A summary of stock option activity for the year ended December 31, 2019 is as follows (shares and aggregate intrinsic value in thousands):

 

 

 

Shares

 

 

Wtd. Avg.

Exercise Price

 

 

Wtd. Avg.

Remaining

Contractual

Life

 

Aggregate

Intrinsic

Value

 

Outstanding at December 31, 2018

 

 

4

 

 

$

31.89

 

 

 

 

 

 

 

Granted

 

 

—

 

 

$

—

 

 

 

 

 

 

 

Expired

 

 

(2

)

 

$

29.75

 

 

 

 

 

 

 

Forfeited

 

 

—

 

 

$

—

 

 

 

 

 

 

 

Outstanding at December 31, 2019

 

 

2

 

 

$

34.54

 

 

2.37 years

 

$

—

 

Vested and expected to vest

 

 

2

 

 

$

34.54

 

 

2.37 years

 

$

—

 

Exercisable at December 31, 2019

 

 

2

 

 

$

34.54

 

 

2.37 years

 

$

—