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Earnings per share (Tables)
3 Months Ended
Dec. 31, 2019
Earnings Per Share  
Earnings per share (in thousands, except per share amounts)

    Three Months ended
    December 31,
    2019   2018
Weighted average common shares                
outstanding during the period                
- shares used for basic                
 earnings per common share     3,351       3,328  
                 
Common shares issuable under                
 share based payment plans                
 which are potentially dilutive     —         3  
                 
Common shares used for diluted                
 earnings per common share     3,351       3,331  
                 
Net income (loss)   $ (464     884  
                 
Earnings per common share:                
-basic   $ (0.14     0.27  
-diluted   $ (0.14     0.27