CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Net Sales:
Total net sales	$ 34,808,513	$ 27,740,695	$ 23,044,796
Cost of sales:
Total cost of sales	13,497,442	11,066,314	10,263,166
Gross profit	21,311,071	16,674,381	12,781,630
Operating expenses:
Research and development	3,129,518	2,705,140	2,622,919
Selling, general and administrative	10,822,505	6,753,915	6,257,732
Total operating expenses	13,952,023	9,459,055	8,880,651
Operating income	7,359,048	7,215,326	3,900,979
Interest expense	(393,281)
Interest income	518,188	61,051	1,234
Other income	151,317	65,232	74,906
Income before income taxes	7,635,272	7,341,609	3,977,119
Income tax expense (benefit)	1,607,517	1,817,831	(1,087,783)
Net income	$ 6,027,755	$ 5,523,778	$ 5,064,902
Net income per common share:
Basic	$ 0.35	$ 0.32	$ 0.29
Diluted	$ 0.35	$ 0.32	$ 0.29
Weighted average shares outstanding:
Basic	17,411,684	17,256,750	17,225,423
Diluted	17,419,185	17,257,871	17,226,620
Product
Net Sales:
Total net sales	$ 22,589,657	$ 22,400,159	$ 18,725,789
Cost of sales:
Total cost of sales	9,715,517	9,402,900	8,695,568
Customer Service
Net Sales:
Total net sales	11,086,062	4,879,591	4,034,294
Cost of sales:
Total cost of sales	3,386,122	1,502,899	1,489,942
Engineering development contracts
Net Sales:
Total net sales	1,132,794	460,945	284,713
Cost of sales:
Total cost of sales	$ 395,803	$ 160,515	$ 77,656