REVENUE (Schedule of Contract Liabilities on Uncompleted Contracts) (Details) - USD ($) |
Mar. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
|---|---|---|---|
| REVENUES: | |||
| Billings and/or cash receipts on uncompleted contracts | $ 2,530,216 | $ 2,978,007 | $ 35,665 |
| Less: costs and estimated earnings recognized | (2,364,183) | (2,268,454) | |
| Contract liabilities | $ 166,033 | $ 709,553 | $ 8,661 |
| X | ||||||||||
- Definition Costs and estimated earnings recognized. No definition available.
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- Definition Costs and estimated earnings recognized. No definition available.
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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. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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