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Earnings Per Share (Tables)
 3 Months Ended
Dec. 31, 2017
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 (loss) income per common share calculations (in thousands, except per common share data):
 
Three months ended December 31,
 
2017
 
2016
Numerator:
 
 
 
Net (loss) income
$
(4,569
)
 
$
2,357

 
 
 
 
Denominator:
 
 
 
Denominator for basic net (loss) income per common share — weighted average shares outstanding
26,748

 
26,175

Effect of dilutive securities:
 
 
 
Stock options and restricted stock units
—

 
797

Denominator for diluted net (loss) income per common share — adjusted weighted average shares
26,748

 
26,972

 
 
 
 
Net (loss) income per common share, basic
$
(0.17
)
 
$
0.09

Net (loss) income per common share, diluted
$
(0.17
)
 
$
0.09