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Restructuring Expense (Tables)
 12 Months Ended
Dec. 31, 2019
Restructuring Expense  
Summary of restructuring activities

The following table summarizes the activity in accrued restructuring expense, included in accrued expenses, for the years ended December 31, 2019, 2018 and 2017 (in thousands):

 

 

 

 

 

 

Severance and

 

    

Other Restructuring Costs

Accrued restructuring, December 31, 2016

 

$

15

Provision for restructuring expense

 

 

1,349

Cash payments

 

 

(867)

Accrued restructuring, December 31, 2017

 

$

497

Provision for restructuring expense

 

 

 —

Cash payments

 

 

(497)

Accrued restructuring, December 31, 2018

 

$

 —

Provision for restructuring expense

 

 

2,085

Cash payments

 

 

(1,803)

Accrued restructuring, December 31, 2019

 

$

282