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Loss per common share
 6 Months Ended
Jun. 30, 2011
Loss per common share [Abstract]  
Loss per common share
5.    Loss per common share

Basic and diluted loss per common share was computed as follows:

   
(in thousands, except per share amounts)
 
   
Three Months Ended
June 30,
   
Six Months Ended
June 30,
 
   
2011
   
2010
   
2011
   
2010
 
Numerator:
                         
   Net loss
 
$
(3,305
)
 
$
(4,427
) 
 
$
(11,242
)
 
$
(8,150
)
                                 
Denominator:
                               
   Basic-weighted average shares
   
17,534
     
17,190
     
17,490
     
17,141
 
   Effect of dilutive stock options
   
-
     
-
     
-
     
-
 
   Diluted-weighted average shares
   
17,534
     
17,190
     
17,490
     
17,141
 
                                 
Basic loss per common share
 
$
(0.19
)
 
$
(0.26
)
 
$
(0.64
)
 
$
(0.48
)
Diluted loss per common share
 
$
(0.19
)
 
$
(0.26
) 
 
$
(0.64
)
 
$
(0.48
)

           For the three months ended June 30, 2011 and 2010, options totaling 443,000 and 546,000, respectively, were outstanding, but were not included in the calculation of diluted weighted average shares as their exercise prices were greater than the average market price of the common shares.  For the six months ended June 30, 2011 and 2010, options totaling 479,000 and 544,000, respectively, were outstanding but were not included in the calculation of diluted weighted average shares as their exercise prices were greater than the average market price of the common shares.