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Restructuring (Tables)
6 Months Ended
Jun. 30, 2019
Restructuring And Related Activities [Abstract]  
Schedule of Components of the Restructuring Liabilities

The outstanding restructuring liabilities are included in accrued liabilities on the condensed consolidated balance sheets. As of June 30, 2019, the components of the restructuring liabilities were as follows (in thousands):

 

 

Severance and Other

Termination Benefits

 

Balance at December 31, 2018

$

-

 

Restructuring charges (a)

 

4,655

 

Cash payments or settlements

 

-

 

Balance at June 30, 2019

$

4,655

 

 

(a)

Excludes stock-based compensation expense of $4.1 million