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Acquisitions (Tables)
 3 Months Ended
Dec. 31, 2016
Acquisitions [Abstract]  
Pro forma financial information
The unaudited pro forma financial information is presented for informational purposes only and is not necessarily indicative of the results of operations that would have been achieved if the acquisition had taken place on October 1, 2015.
 
  
(in thousands of dollars)
 
  
Three Months ended
 
  
December 31,
2016
  
January 2,
2016
 
Revenue
 
$
12,543
  
$
12,701
 
Net (loss) income
 
$
(2,497
)
 
$
164