Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Revenue, net	$ 106,298	$ 85,205	$ 65,463
Cost of sales	66,787	50,675	41,022
Gross profit	39,511	34,530	24,441
Selling, general and administrative	28,300	24,740	21,397
Research, development and engineering	6,390	5,979	3,312
Gain on sale of fixed assets	(12,465)
Severance expense	0	86	217
Operating income (loss)	17,286	3,725	(485)
Loss on sale of subsidiary	0	0	(2,793)
Interest income (expense) and other, net	1,499	(291)	162
Income (loss) from continuing operations before income taxes	18,785	3,434	(3,116)
Income tax provision	1,418	1,926	791
Income (loss) from continuing operations, net of tax	17,367	1,508	(3,907)
Loss from discontinued operations, net of tax			(11,816)
Net income (loss)	$ 17,367	$ 1,508	$ (15,723)
Income (Loss) Per Basic Share:
Basic income (loss) per share from continuing operations	$ 1.24	$ 0.11	$ (0.28)
Basic loss per share from discontinued operations			(0.83)
Net income (loss) per basic share	1.24	0.11	(1.11)
Income (Loss) Per Diluted Share:
Diluted income (loss) per share from continuing operations	1.22	0.11	(0.28)
Diluted loss per share from discontinued operations			(0.83)
Net income (loss) per diluted share	$ 1.22	$ 0.11	$ (1.11)
Weighted average shares outstanding - basic	14,014	14,189	14,159
Weighted average shares outstanding - diluted	14,184	14,340	14,159