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LONG-TERM DEBT (Financed Insurance Loan) (Details) - USD ($) | Sep. 30, 2019 | Jul. 31, 2019 | Jan. 02, 2019 | Dec. 31, 2018 | Jul. 31, 2018
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Debt Instrument [Line Items] |  |  |  |  |
Interest rate (as a percent) |  |  | 8.00% |  |
Total debt | $ 661,000 |  |  | $ 516,000 |
Financed Insurance Loan [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument, face amount |  | $ 400,000 |  |  | $ 400,000
Interest rate (as a percent) |  | 5.00% |  |  | 4.89%
Total debt | $ 388,000 |  |  | $ 204,000 |

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