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LOANS PAYABLE - Warrants fair value (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended		21 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Dec. 31, 2020
Warrants issued	147,058		147,058		147,058
Warrant purchase price	$ 4.08		$ 4.08		$ 4.08
Amortization of debt issuance costs	$ 300	$ 200	$ 694	$ 694	$ 700
Unamortized Debt Issuance Expense	$ 386		$ 386		$ 386	$ 1,080
Warrants [Member]
Warrant coverage percentage			2.00%
Warrants issued	147,058		147,058		147,058
Warrant purchase price	$ 4.08		$ 4.08		$ 4.08
Class Of Warrant Or Right Fair Value	$ 1,000		$ 1,000		$ 1,000
Financing expenses, Hercules Loan Agreement			$ 2,800

X

- References

No definition available.

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- Definition

Warrant coverage percentage.

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No definition available.

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- Definition

Amount of amortization expense attributable to debt issuance costs.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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-Topic 835
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-Section 45
-Paragraph 3
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- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21475-112644

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- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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- Definition

This element represents interest incurred for borrowed money which was used to produce goods or render services.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 220
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- Definition

The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

+ References

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