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Other Current Liabilities (Tables)
 12 Months Ended
Dec. 31, 2018
Other Current Liabilities [Abstract]  
Schedule of Other Current Liabilities

Other current liabilities consists of (in thousands):

 

 

 

 

 

 

 

 

 

December 31,

 

    

2018

    

2017

Due to affiliate

 

$

164

 

$

 9

Accrued professional fees

 

 

1,206

 

 

1,117

Pension and other postretirement liabilities

 

 

69

 

 

69

Accrued liabilities

 

 

56

 

 

84

 

 

$

1,495

 

$

1,279