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Supplemental Disclosure of Cash Flow Information
 12 Months Ended
Dec. 31, 2017
Supplemental Disclosure of Cash Flow Information [Abstract]  
Supplemental Disclosure of Cash Flow Information
18.  Supplemental Disclosure of Cash Flow Information

(in thousands)
Year ended December 31,
 
2017
 
2016
 
Cash paid:
      
Interest
$
-
 
$
13
 
Income taxes
$
155
 
$
370