Note 7 - Commitments and Contingencies - Supplemental Balance Sheet Information Related to Leases (Details) - USD ($)	Jun. 30, 2022	Dec. 31, 2021
ROU assets, net	$ 134,033	$ 156,626
Current operating lease liabilities	37,329	39,909
Operating lease liabilities payable	100,772	119,886
Total operating lease liabilities	$ 138,101	$ 159,795
Weighted-average remaining lease term (in months) (Month)	42 months	47 months
Weighted-average discount rate	3.80%	3.80%

Present value of lessee's discounted obligation for lease payments from operating lease.

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Present value of lessee's discounted obligation for lease payments from operating lease, classified as current.

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Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent.

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Amount of lessee's right to use underlying asset under operating lease.

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Weighted average discount rate for operating lease calculated at point in time.

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Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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