Note 8 - Inventories - Summary of Inventories (Details) - USD ($)	Jun. 30, 2022	Dec. 31, 2021
Raw materials	$ 582,458	$ 494,348
Work in process	165,263	119,069
Finished products	980,483	797,372
Total inventories	$ 1,728,204	$ 1,410,789

Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of merchandise or goods held by the company that are readily available for sale.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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