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Condensed Consolidated Statements of Operations - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2023
Mar. 31, 2022
Income Statement [Abstract]        
Revenues, net $ 33,310 $ 27,556 $ 54,868 $ 54,019
Cost of sales 19,840 16,396 33,095 32,961
Gross profit 13,470 11,160 21,773 21,058
Selling, general and administrative 11,434 6,765 20,624 13,851
Research, development and engineering 1,517 1,800 2,910 3,372
Severance expense     400  
Operating income (loss) 519 2,595 (2,161) 3,835
Interest (expense) income and other, net (261) 30 (329) (53)
Income (loss) before income tax provision 258 2,625 (2,490) 3,782
Income tax (benefit) provision (2,946) 660 (2,950) 820
Net income $ 3,204 $ 1,965 $ 460 $ 2,962
Income Per Share:        
Net income per basic share $ 0.23 $ 0.14 $ 0.03 $ 0.21
Net income per diluted share $ 0.23 $ 0.14 $ 0.03 $ 0.21
Weighted average shares outstanding - basic 14,028 13,979 14,018 14,118
Weighted average shares outstanding - diluted 14,157 14,144 14,142 14,318