CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Net Sales:
Total net sales	$ 7,340,454	$ 6,845,820	$ 13,856,709	$ 13,541,598
Cost of sales:
Total cost of sales	2,600,303	2,663,210	5,392,755	5,391,267
Gross profit	4,740,151	4,182,610	8,463,954	8,150,331
Operating expenses:
Research and development	866,198	650,031	1,536,643	1,386,556
Selling, general and administrative	2,446,635	1,724,800	4,708,498	3,531,782
Total operating expenses	3,312,833	2,374,831	6,245,141	4,918,338
Operating income	1,427,318	1,807,779	2,218,813	3,231,993
Interest income	130,951	346	246,843	442
Other income	23,258	11,555	41,455	27,793
Income before income taxes	1,581,527	1,819,680	2,507,111	3,260,228
Income tax expense	310,424	390,110	537,357	697,600
Net income	$ 1,271,103	$ 1,429,570	$ 1,969,754	$ 2,562,628
Net income per common share:
Basic	$ 0.07	$ 0.08	$ 0.11	$ 0.15
Diluted	$ 0.07	$ 0.08	$ 0.11	$ 0.15
Weighted average shares outstanding:
Basic	17,352,340	17,253,746	17,334,553	17,250,059
Diluted	17,354,030	17,253,746	17,340,104	17,250,059
Product
Net Sales:
Total net sales	$ 7,340,454	$ 6,647,617	$ 13,489,810	$ 13,343,395
Cost of sales:
Total cost of sales	$ 2,600,303	2,646,462	5,335,349	5,374,519
Engineering development contracts
Net Sales:
Total net sales		198,203	366,899	198,203
Cost of sales:
Total cost of sales		$ 16,748	$ 57,406	$ 16,748