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STOCKHOLDERS EQUITY - Common Stock Issued, Net of Issuance Costs (Details) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions |  |  |  | 12 Months Ended | 17 Months Ended
--- | --- | --- | --- | --- | ---
Aug. 20, 2021 | Dec. 04, 2020 | Apr. 14, 2017 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2022
Net proceeds from common stock |  |  |  | $ 25,901 | $ 84,142 |
2020 Lincoln Park PA |  |  |  |  |  |
Maximum aggregate offering price |  | $ 100,000 |  |  |  |
Period for financing from common stock |  | 36 months |  |  |  |
Number of common stock issued |  |  |  |  | 6.1 |
Net proceeds from common stock |  |  |  |  | $ 34,600 |
Threshold average sale price per share of common stock |  | $ 6.15 |  |  |  |
Registered share available for future sales |  | 16.0 |  |  |  |
2020 Lincoln Park PA | Maximum |  |  |  |  |  |
Percentage of common stock issuable |  | 19.99% |  |  |  |
2020 Lincoln Park PA | Lincoln Park |  |  |  |  |  |
Number of common stock issued |  |  |  |  |  | 6.3
Minimum percentage considered for not to sale common stock |  | 9.99% |  |  |  |
Registered share available for future sales |  |  |  | 9.7 |  | 9.7
Amount available for future sales |  |  |  | $ 20,800 |  | $ 20,800
ATM Offering Agreement |  |  |  |  |  |
Number of common stock issued |  |  |  | 13.0 |  |
Net proceeds from common stock | $ 50,000 |  |  | $ 25,900 |  |
ATM Offering Agreement | Cantor Fitzgerald & Co |  |  |  |  |  |
Number of common stock issued |  |  |  | 13.0 | 10.0 |
Net proceeds from common stock |  |  |  | $ 25,900 | $ 49,500 |
ATM Offering Agreement | Cantor Fitzgerald & Co | Maximum |  |  |  |  |  |
Sales commission percentage |  |  | 2.50% |  |  |
Controlled Equity Offering Sales Agreement with Cantor Fitzgerald and Co. |  |  |  |  |  |
Net proceeds from common stock |  |  |  | $ 29,200 |  |

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