Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Revenues, net	$ 28,579	$ 19,790	$ 55,908	$ 37,765
Cost of sales	16,396	12,062	32,961	22,525
Gross profit	12,183	7,728	22,947	15,240
Selling, general and administrative	7,788	5,688	15,740	10,901
Research, development and engineering	1,800	1,869	3,372	3,114
Operating income	2,595	171	3,835	1,225
Interest income (expense) and other, net	30	73	(53)	(182)
Income before income tax provision	2,625	244	3,782	1,043
Income tax provision	660	490	820	570
Net income (loss)	$ 1,965	$ (246)	$ 2,962	$ 473
Income (Loss) Per Share:
Net income (loss) per basic share	$ 0.14	$ (0.02)	$ 0.21	$ 0.03
Net income (loss) per diluted share	$ 0.14	$ (0.02)	$ 0.21	$ 0.03
Weighted average shares outstanding - basic	13,979,000	14,151,000	14,118,000	14,121,000
Weighted average shares outstanding - diluted	14,144,000	14,151,000	14,318,000	14,217,000