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Earnings Per Share (Tables)
12 Months Ended
Sep. 30, 2021
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):  
 Year Ended September 30,
 202120202019
Numerator:   
Net income $631 $16,660 $9,890 
Denominator:   
Weighted average basic shares11,705 11,624 11,571 
Dilutive effect of restricted stock units84 69 63 
Weighted average diluted shares11,789 11,693 11,634 
Earnings per share:   
Basic$0.05 $1.43 $0.85 
Diluted$0.05 $1.42 $0.85