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Note 11 - Segment Reporting (Details Textual)	3 Months Ended		6 Months Ended
	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)
Number of Operating Segments			3
Revenue from Contract with Customer, Including Assessed Tax	$ 5,808,588	$ 4,034,408	$ 10,460,820	$ 7,400,268
Intersegment Eliminations [Member]
Revenue from Contract with Customer, Including Assessed Tax	(380,000)	(19,000)	(425,000)	(114,000)
SDC [Member] | Intersegment Eliminations [Member]
Revenue from Contract with Customer, Including Assessed Tax	$ 400,000	$ 20,000.00	$ 400,000	$ 100,000

X

- Definition

Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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+ References

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