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Earnings Per Share (Tables)
6 Months Ended
Mar. 31, 2013
Earnings Per Share [Abstract]  
Schedule of Calculation of Numerator and Denominator in Earnings Per Share
The following table is a reconciliation of the numerators and denominators in the net income per common share calculations (in thousands, except per common share data):
 
Three months ended March 31,
 
Six months ended March 31,
 
2013
 
2012
 
2013
 
2012
Numerator:
 
 
 
 
 
 
 
Net income
$
1,000

 
$
2,122

 
$
2,230

 
$
2,846

Denominator:
 
 
 
 
 
 
 
Denominator for basic net income per common share — weighted average shares outstanding
26,138

 
25,709

 
26,163

 
25,674

Effect of dilutive securities:
 
 
 
 
 
 
 
Employee stock options, restricted stock units and employee stock purchase plan
338

 
496

 
311

 
498

Denominator for diluted net income per common share — adjusted weighted average shares
26,476

 
26,205

 
26,474

 
26,172

Net income per common share, basic
$
0.04

 
$
0.08

 
$
0.09

 
$
0.11

Net income per common share, diluted
$
0.04

 
$
0.08

 
$
0.08

 
$
0.11