Note 1 - Nature of Business and Summary of Significant Accounting Policies (Details Textual)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Dec. 31, 2024 USD ($)	Jan. 01, 2024 USD ($)
Contract with Customer, Asset, after Allowance for Credit Loss, Current	$ 92,296		$ 92,296		$ 68,400
Accounts Receivable, after Allowance for Credit Loss						$ 3,000,544
Contract with Customer, Asset, Allowance for Credit Loss	1,005,224		$ 1,005,224		$ 1,229,290
Number of Certificates of Deposit			1		2
Certificates of Deposit, Term (Month)			11 months		7 months
Inventory Valuation Reserves	7,697		$ 7,697		$ 7,697
Inventory, Net	1,883,361		1,883,361		1,935,679
Inventory, Work in Process, Gross	138,515		138,515		147,724
Capitalized Contract Cost, Gross	$ 0	$ 0	$ 0	$ 0
Capitalized Contract Cost, Amortization Period (Year)	5 years		5 years
Research and Development Expense			$ 372,223	$ 143,831
Prepaid Expenses and Other Current Assets [Member]
Prepaid Supplies	$ 68,065		$ 68,065		$ 50,068
Geographic Concentration Risk [Member] | Revenue Benchmark [Member] | UNITED STATES
Concentration Risk, Percentage	93.30%	94.80%
Certificate of Deposit Maturing November 2024 [Member]
Certificates of Deposit, Interest Rate			4.50%		4.70%
Certificate of Deposit Maturing February 2025 [Member]
Certificates of Deposit, Interest Rate					4.50%
Minimum [Member]
Contract with Customer, Liability, Interest Rate	2.00%		2.00%
Property, Plant and Equipment, Useful Life (Year)	2 years		2 years
Maximum [Member]
Contract with Customer, Liability, Interest Rate	8.00%		8.00%
Certificates of Deposit, Term (Month)					11 months
Property, Plant and Equipment, Useful Life (Year)	5 years		5 years
Customer Deposits [Member]
Contract with Customer, Liability						$ 785,805