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The Company and Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2014
The Company and Summary of Significant Accounting Policies [Abstract]  
Activity in the warranty accrual
The activity in the warranty accrual during the years ended December 31, 2014 and 2013 is summarized as follows:
  
December 31,
 
  
2014
  
2013
 
Accrual at beginning of year
 
$
1,151
  
$
1,440
 
Additions charged to warranty expense
  
808
   
1,206
 
Expiring warranties
  
(341
)
  
(410
)
Claims satisfied
  
(857
)
  
(1,085
)
Total
  
761
   
1,151
 
Less: current portion
  
(665
)
  
(1,094
)
Long term accrued warranty
 
$
96
  
$
57
 
Calculation of basic and diluted earnings per common share using weighted average shares outstanding
Basic and diluted earnings per common share were calculated using the following weighted average shares outstanding for the years ended December 31, 2014, 2013 and 2012:
  
December 31,
  
2014
 
2013
 
2012
Weighted average number of common and common equivalent shares outstanding:
      
Basic number of common shares outstanding
 
18,940,355
 
20,454,970
 
20,355,520
Dilutive effect of stock options and warrants
 
-
 
202,270
 
408,834
Diluted number of common and common stock equivalent shares outstanding
 
18,940,355
 
20,657,240
 
20,764,354