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Note 16 - Quarterly Financial Data (UNAUDITED)
12 Months Ended
Dec. 31, 2011
Notes To Financial Statements  
Quarterly Financial Information [Text Block]
16.  QUARTERLY FINANCIAL DATA (UNAUDITED)

   
First
   
Second
   
Third
   
Fourth
 
2011
 
Quarter
   
Quarter
   
Quarter
   
Quarter
 
Net sales
  $ 15,879,040     $ 15,933,921     $ 15,385,421     $ 18,904,565  
Gross profit
    9,524,848       9,845,254       9,238,278       11,728,779  
Net income from continuing operations
    1,150,576       1,076,356       830,474       1,696,563  
Net income
    1,150,576       1,076,356       829,106       1,696,563  
Net income from continuing operations per common share:
                               
Basic
    0.11       0.11       0.08       0.17  
Diluted
    0.11       0.11       0.08       0.17  
Net income per common share:
                               
Basic
    0.11       0.11       0.08       0.17  
Diluted
    0.11       0.11       0.08       0.17  
Weighted average number of common shares outstanding:
                               
Basic
    10,156,442       10,156,442       10,156,442       10,156,442  
Diluted
    10,169,701       10,168,098       10,168,326       10,166,658  
 
                         
   
First
   
Second
   
Third
   
Fourth
 
2010
 
Quarter
   
Quarter
   
Quarter
   
Quarter
 
Net sales
  $ 14,588,538     $ 14,350,822     $ 13,640,193     $ 17,313,317  
Gross profit
    8,976,575       8,714,966       8,182,526       10,376,770  
Net income from continuing operations
    947,577       1,061,110       592,646       1,557,158  
Net income
    948,113       1,061,110       593,905       1,557,129  
Net income from continuing operations per common share:
                               
Basic
    0.09       0.10       0.06       0.15  
Diluted
    0.09       0.10       0.06       0.15  
Net income per common share:
                               
Basic
    0.09       0.10       0.06       0.15  
Diluted
    0.09       0.10       0.06       0.15  
Weighted average number of common shares outstanding:
                               
Basic
    10,137,715       10,191,506       10,256,442       10,247,746  
Diluted
    10,213,677       10,238,217       10,257,743       10,255,156