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Restructuring Charges (Tables)
 6 Months Ended
Jun. 30, 2018
Restructuring Charges [Abstract]  
Restructuring and Related Costs [Table Text Block]
The following table summarizes the details of changes in our restructuring-related accrual for the period ended June 30, 2018 (in thousands):

 
Accrued Balance December 31, 2017
 
Charges
Incurred
 
Payments
 
Other Adjustments
 
Accrued Balance
June 30,
 2018
Severance pay and benefits
$
915

 
$
2,345

 
$
(2,611
)
 
$
—

 
$
649

Employment agreement buyout
1,114

 
—

 
(191
)
 
(4
)
 
919

Facility closure expenses
—

 
160

 
(160
)
 
—

 
—

 
$
2,029

 
$
2,505

 
$
(2,962
)
 
$
(4
)
 
$
1,568