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EARNINGS PER SHARE (Tables)
 9 Months Ended
Jun. 30, 2017
Earnings Per Share [Abstract]  
Computation of Basic and Diluted Earnings Per Share
The following table reconciles basic and diluted weighted average shares used in the computation of earnings per share (in thousands, except per share data):
 
Three months ended June 30,
 
Nine months ended June 30,
 
2017
 
2016
 
2017
 
2016
Numerator:
 
 
 
 
 
 
 
Net income (loss)
$
(3,215
)
 
$
4,894

 
$
(4,343
)
 
$
10,002

Denominator:
 
 
 
 
 
 
 
Weighted average basic shares
11,463

 
11,397

 
11,449

 
11,387

Dilutive effect of restricted stock units
—

 
76

 
—

 
48

Weighted average diluted shares with assumed conversions
11,463

 
11,473

 
11,449

 
11,435

Net income (loss) per share:
 
 
 
 
 
 
 
Basic
$
(0.28
)
 
$
0.43

 
$
(0.38
)
 
$
0.88

Diluted
$
(0.28
)
 
$
0.43

 
$
(0.38
)
 
$
0.87