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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - USD ($)	Sep. 30, 2021	Dec. 31, 2020	Dec. 31, 2019
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Equipment parts inventory	$ 706,230	$ 690,069	$ 0
Finished goods inventory	95,603	181,453	0
Sales demo inventory	1,074,240	1,281,564	495,150
Work in process inventory	66,360	19,241	0
Total inventory	$ 1,942,433	$ 2,172,327	$ 495,150

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Gross amount of sales demo.

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- Definition

Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

+ References

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-Publisher FASB
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-SubTopic 10
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-Paragraph 1
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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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Gross amount of unprocessed materials to be used in manufacturing or production process and supplies that will be consumed.

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Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.

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