Note 2 - Summary of Significant Accounting Policies - Customer Concentration Risk (Details) - USD ($)	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Revenues	$ 34,475,865	$ 36,968,499
Revenue from Contract with Customer Benchmark [Member] | Customer Concentration Risk [Member] | Customer A [Member]
Revenues	$ 6,730,687	$ 6,095,403
Customer concentration risk percentage	20.00%	16.00%
Revenue from Contract with Customer Benchmark [Member] | Customer Concentration Risk [Member] | Customer B [Member]
Revenues	$ 3,804,951	$ 4,871,073
Customer concentration risk percentage	11.00%	13.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer A [Member]
Customer accounts receivable amount	$ 490,848	$ 1,346,854
Customer concentration risk percentage	11.00%	22.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer B [Member]
Customer accounts receivable amount	$ 303,777	$ 714,399
Customer concentration risk percentage	7.00%	11.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer C [Member]
Customer accounts receivable amount	$ 630,494	$ 675,725
Customer concentration risk percentage	14.00%	11.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer D [Member]
Customer accounts receivable amount	$ 465,320	$ 310,723
Customer concentration risk percentage	10.00%	5.00%