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WARRANTS (Details) - $ / shares	Mar. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Class of Warrant or Right [Line Items]
Number of Shares (in shares)	44,205,800	44,296,242	29,624,663
Minimum
Class of Warrant or Right [Line Items]
Exercise price		$ 0.36	$ 0.36
Warrant term		1 year	1 year
Maximum
Class of Warrant or Right [Line Items]
Exercise price		$ 1.53	$ 1.53
Warrant term	6 years	5 years	5 years
Series A'
Class of Warrant or Right [Line Items]
Exercise price	$ 0.4485
Number of Shares (in shares)	178,372
Warrant term	10 years
Series D
Class of Warrant or Right [Line Items]
Exercise price	$ 1.5326
Number of Shares (in shares)	6,157,542
Warrant term	7 years
Series D'
Class of Warrant or Right [Line Items]
Exercise price	$ 1.5326
Number of Shares (in shares)	37,869,886
Warrant term	7 years
Shares reserved for warrants to purchase shares of common stock
Class of Warrant or Right [Line Items]
Number of Shares (in shares)	6,001,639	6,001,639	6,001,639
Shares reserved for warrants to purchase shares of common stock | Minimum
Class of Warrant or Right [Line Items]
Exercise price	$ 0.36
Warrant term	1 year
Shares reserved for warrants to purchase shares of common stock | Maximum
Class of Warrant or Right [Line Items]
Exercise price	$ 1.53

X

- 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=109259400&loc=d3e21475-112644

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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.

+ References

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- Definition

Number of warrants or rights outstanding.

+ References

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- Definition

Period between issuance and expiration of outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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