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RECEIVABLES (Details) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Nov. 07, 2018 USD ($) | Dec. 31, 2015 note | Dec. 31, 2014 USD ($)
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Accounts Receivable, Net, Current | $ 1,169,000 | $ 1,254,000 |  |  |  |
Notes Receivable, Current | 343,000 | 343,000 |  |  |  |
Number of Note Receivables | note |  |  |  |  | 2 |
Financing receivable, principal amount |  |  | $ 500,000 | $ 550,000 |  | $ 1,050,000.00
Financing receivable, reserve against collectability | 220,000 | 220,000 |  |  |  |
Trade receivables - other |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Accounts Receivable, Net, Current | $ 826,000 | $ 911,000 |  |  |  |

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