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Basic and Diluted Earnings (Loss) per Share (Tables)
 6 Months Ended
Jun. 30, 2013
Earnings Per Share [Abstract]  
Schedule of Calculation of Numerator and Denominator in Earnings Per Share [Table Text Block]
The following table sets forth the computation of basic and diluted earnings (loss) per share:
 
 
 
Three months ended June 30
 
Six Months ended June 30
 
 
 
2013
 
2012
 
2013
 
2012
 
Numerator:
 
 
 
 
 
 
 
 
 
 
 
 
 
Net income (loss)
 
$
(213,745)
 
$
102,577
 
$
(18,944)
 
$
634,961
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Denominator:
 
 
 
 
 
 
 
 
 
 
 
 
 
Denominator for basic earnings (loss) per
    share—weighted average shares
 
 
12,616,000
 
 
12,507,000
 
 
12,617,000
 
 
12,499,000
 
Dilutive effect of employee stock options
    and other warrants
 
 
92,000
 
 
171,000
 
 
90,000
 
 
159,000
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Denominator for diluted earnings (loss) per
    share—adjusted weighted average shares
 
 
12,708,000
 
 
12,678,000
 
 
12,707,000
 
 
12,658,000
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Basic earnings (loss) per share
 
$
(0.02)
 
$
0.01
 
$
(0.00)
 
$
0.05
 
Diluted earnings (loss) per share
 
$
(0.02)
 
$
0.01
 
$
(0.00)
 
$
0.05