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Note 10 - Inventory - Components of Inventory (Details) - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Finished goods	$ 494,322	$ 221,130
Fabricated assemblies	106,125	109,817
Total inventory	$ 600,447	$ 330,947

X

- Definition

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.

+ References

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X

- Definition

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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- Definition

Aggregated amount of unprocessed materials to be used in manufacturing or production process and supplies that will be consumed. This amount is net of valuation reserves and adjustments.

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