Note 1 - Summary of Significant Accounting Policies - Accounts Receivable (Details) - USD ($)	9 Months Ended
Sep. 30, 2026	Sep. 30, 2025
Balance at January 1	$ 336,539	$ 486,772
Decrease from accounts receivable collected	(85,752)	(193,527)
Increase for accounts receivable not yet collected	176,939	9,085
Balance at September 30	$ 427,726	$ 302,330

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 954
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Name:	us-gaap_AccountsReceivableNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant