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Calculation of earnings per share and weighted average shares outstanding
 6 Months Ended
Apr. 02, 2016
Calculation of earnings per share and weighted average shares outstanding [Abstract]  
Calculation of earnings per share and weighted average shares outstanding
(6)Calculation of earnings per share and weighted average shares outstanding

Basic earnings per share is computed by dividing the net income or loss for the period by the weighted average number of shares of common stock outstanding during the period. The computation of diluted earnings per share is similar to the computation of basic earnings per share, except that the denominator is increased for the assumed exercise of dilutive options and other potentially dilutive securities, including convertible preferred stock, using the treasury stock method, unless the effect is anti-dilutive.

Basic and diluted net income per common share for the three and six month periods ended April 2, 2016 and April 4, 2015 were calculated as follows:

  
(in thousands of dollars except per share data)
 
  
Three months ended
  
Six months ended
 
  
April 2,
2016
  
April 4,
2015
  
April 2,
2016
  
April 4,
2015
 
             
Numerator:
            
Net income (loss) attributable to common stockholders for computing net income (loss) per ordinary share - basic
 
$
(1,694
)
 
$
539
  
$
(1,683
)
 
$
710
 
Dividend eliminated upon assumed conversion of convertible preferred stock
  
-
   
114
   
-
   
225
 
Net income (loss) attributable to common stockholders for computing net income (loss) per ordinary share - diluted
 
$
(1,694
)
 
$
653
  
$
(1,683
)
 
$
935
 
                 
Denominator:
                
Weighted average shares used in calculating net income (loss) per ordinary share - basic
  
3,911
   
3,466
   
3,709
   
3,446
 
Adjustment for assumed conversion of convertible preferred stock
  
-
   
1,382
   
-
   
1,382
 
Adjustment for shares issuable upon vesting of restricted stock
  
-
   
64
   
-
   
75
 
Weighted average shares used in calculating net income (loss) per ordinary share - diluted
  
3,911
   
4,912
   
3,709
   
4,903
 
Net income (loss) per ordinary share - basic
 
$
(0.43
)
 
$
0.16
  
$
(0.45
)
 
$
0.21
 
Net income (loss) per ordinary share - diluted
 
$
(0.43
)
 
$
0.14
  
$
(0.45
)
 
$
0.19
 
No. of shares of convertible preferred stock that are anti-dilutive excluded from calculation of common stock equivalents
  
1,418
   
-
   
1,438
   
-