STOCKHOLDERS' DEFICIT (Details 3) - Convertible Promissory Note [Member] - Liability Instrument - Warrants [Member] - USD ($) $ in Thousands  | 
9 Months Ended | 12 Months Ended | 
|---|---|---|
Sep. 30, 2021  | 
Dec. 31, 2020  | 
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| Class Of Warrant Or Right [Line Items] | ||
| Balance, beginning of period | $ 988 | |
| Fair value at issuance date | $ 1,425 | |
| Change in fair value included in the statement of comprehensive (income) loss | 362 | (437) | 
| Balance, end of period | $ 1,350 | $ 988 | 
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available. 
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- Definition Amount of gain (loss) recognized in other comprehensive income (OCI) from liability measured at fair value on recurring basis using unobservable input (level 3). Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Amount of issuances of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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