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Business Acquisition (Tables)
 9 Months Ended
Jun. 30, 2014
Business Combinations [Abstract]  
Pro forma results of operations
The following unaudited pro forma information presents a summary of the results of operations for the Company including GAF as if the acquisition had occurred on October 1, 2012: 
 
Three Months Ended June 30, 2013
 
Nine Months Ended June 30, 2013
Net sales
$
30,123

 
$
88,343

Net income
$
2,457

 
$
7,270

Net income per share (basic)
$
0.46

 
$
1.36

Net income per share (diluted)
$
0.45

 
$
1.35