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REVENUE (Schedule of Contract Liabilities on Uncompleted Contracts) (Details) - USD ($)	Jun. 30, 2021	Dec. 31, 2020
Revenue
Billings and/or cash receipts on uncompleted contracts	$ 2,559,222	$ 2,978,007
Less: Costs and estimated earnings recognized	(2,387,941)	(2,268,454)
Contract liabilities	$ 171,281	$ 709,553

X

- Definition

Costs and estimated earnings recognized.

+ References

No definition available.

+ Details

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Balance Type:	credit
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- Definition

Costs and estimated earnings recognized.

+ References

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- References

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- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=123360276&loc=SL49130531-203044

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=123360276&loc=SL49130532-203044

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130549-203045

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