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Consolidated Statements of Operations - USD ($)
$ in Thousands
 12 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Revenues:    
Revenues $ 43,010 $ 36,979
Cost of revenues 20,371 18,523
Gross Profit 22,639 18,456
Operating expenses    
Selling, general and administrative 12,044 10,792
Research and development 4,554 4,528
Total operating expenses 16,598 15,320
Income from operations 6,041 3,136
Other income 127 221
Income before income taxes 6,168 3,357
Income tax (benefit) expense (5,706) 572
Net income $ 11,874 $ 2,785
Net income per common share:    
Basic (in dollars per share) $ 0.36 $ 0.09
Diluted (in dollars per share) $ 0.35 $ 0.08
Weighted average common shares outstanding:    
Basic (in shares) 33,220,915 32,689,028
Diluted (in shares) 34,092,328 33,397,095
Product [Member]    
Revenues:    
Revenues $ 39,509 $ 33,384
Service [Member]    
Revenues:    
Revenues $ 3,501 $ 3,595