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STOCK-BASED COMPENSATION, Summary of RSUs (Details) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2022 USD ($) $ / shares shares | Jun. 30, 2021 USD ($) shares | Jun. 30, 2022 USD ($) Goals $ / shares shares | Jun. 30, 2021 USD ($) shares | Mar. 31, 2022 $ / shares
Stock-based Compensation [Abstract] |  |  |  |  |
Share price (in dollars per share) | $ / shares | $ 0.52 |  | $ 0.52 |  | $ 2.05
Stock-based compensation expense recognized | $ | $ 879 | $ 1,154 | $ 2,062 | $ 1,573 |
RSU [Member] |  |  |  |  |
Stock-based Compensation [Abstract] |  |  |  |  |
Number of RSUs granted (in shares) | 0 | 105,000 | 1,101,000 | 105,000 |
Number of stock units awards outstanding (in shares) | 587,000 |  | 587,000 |  |
2022 PSUs [Member] |  |  |  |  |
Stock-based Compensation [Abstract] |  |  |  |  |
Number of performance goals are subject to achieve | Goals |  |  | 4 |  |
Restricted stock units vesting period |  |  | 3 years |  |
Number of performance goals not achieved | Goals |  |  | 1 |  |
Number of RSUs cancelled (in shares) |  |  | 275,000 |  |
Stock-based compensation expense recognized | $ |  |  | $ 100 |  |
2022 PSUs [Member] | Employees [Member] |  |  |  |  |
Stock-based Compensation [Abstract] |  |  |  |  |
Number of RSUs granted (in shares) |  |  | 1,101,000 |  |
2022 PSUs [Member] | Dr. Federoff [Member] |  |  |  |  |
Stock-based Compensation [Abstract] |  |  |  |  |
Number of RSUs granted (in shares) |  |  | 414,000 |  |
Number of RSUs cancelled (in shares) |  |  | 414,000 |  |
Lump sum cash severance paid | $ |  |  | $ 100 |  |
Share price (in dollars per share) | $ / shares | $ 0.81 |  | $ 0.81 |  |

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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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