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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items] |  |
Other current assets | $ 549 | $ 324
Prepaid insurance | 300 | 300
Prepaid assets and other receivables | 200 | 100
Inventory Valuation Reserves | $ 100 | $ 0
Awards outstanding | 0 | 0
Impairment of intangible assets | $ 0 | $ 0
Amortization expense of converted debt issuance costs | 100 | 300
Insurance claims, recoveries | 0 | 0
Income tax, interest and penalties | $ 0 | 0
Share-based compensation arrangement by share-based payment award, expiration period | 10 years |
Advertising expense | $ 100 | 100
Research and development expense | $ 1,300 | $ 1,200
Securities not included in the computation of diluted net loss per share | 3,584,688 | 1,846,989
Performance Based |  |
Finite-Lived Intangible Assets [Line Items] |  |
Awards outstanding | 0 | 53,334
Maximum [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Stock options, unvested options, vesting period | 4 years |

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