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WARRANTS (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  |  |  | 1 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jun. 24, 2021 | Apr. 28, 2021 | Apr. 07, 2021 | Aug. 20, 2020 | Sep. 30, 2021 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Aug. 20, 2021 | Jun. 30, 2021 | Jun. 25, 2021
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |  |  |  |
(Gain) loss from fair value adjustment |  |  |  |  |  | $ 0 | $ (3,424) | $ 84,455 |  |  |
Sale of stock, number of shares Issued in transaction (in shares) |  | 22,500,000 |  |  |  |  |  |  |  |  |
Number of shares called from each warrant (in shares) |  |  |  | 1 |  |  |  |  |  |  |
Exercise Price (in dollars per share) |  |  | $ 0.01 |  |  |  |  |  |  |  |
Number of shares called from exchange of warrants (in shares) |  |  | 350,000 |  |  |  |  |  |  |  |
Warrants and rights outstanding |  |  |  | $ 302,600 |  |  |  |  |  |  |
Cash net of broker fees |  |  |  |  |  |  | 145,300 |  |  |  |
Issuance of common stock warrants for services (Note 14) |  |  | $ 9,200 |  |  |  | $ 9,183 |  |  |  |
Legacy Stem Warrants |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |  |  |  |
Warrants outstanding (in shares) |  | 50,207,439 |  |  |  | 2,533 |  |  |  |  |
Conversion of securities into common stock (in shares) |  | 2,759,970 |  |  |  |  |  |  |  |  |
(Gain) loss from fair value adjustment |  | $ (100,900) |  |  |  |  |  |  |  |  |
Conversion of securities into common stock |  | $ 60,600 |  |  |  |  |  |  |  |  |
Public Warrants |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |  |  |  |
Warrants outstanding (in shares) |  |  |  |  |  | 0 | 0 |  |  |  |
Sale of stock, number of shares Issued in transaction (in shares) |  |  |  | 12,786,168 |  |  |  |  |  |  |
Exercise Price (in dollars per share) |  |  |  | $ 11.50 |  |  |  |  | $ 11.50 |  |
Number of shares called from exchange of warrants (in shares) |  |  |  |  |  |  |  |  | 12,638,723 |  |
Warrants and rights outstanding |  |  |  | $ 185,900 |  |  |  |  |  |  |
Issued irrevocable notice redemption (in shares) |  |  |  |  |  |  |  |  | 12,786,129 |  |
Net gain revaluation and redemption |  |  |  |  | $ 134,900 |  |  |  |  |  |
Gain on redemption of warrants |  |  |  |  |  |  | $ 2,100 |  |  |  |
Private Warrants |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |  |  |  |
Warrants outstanding (in shares) |  |  |  |  |  | 0 |  |  |  | 0 | 7,181,134
(Gain) loss from fair value adjustment | $ 52,000 |  |  |  |  |  |  |  |  |  |
Number of shares called from exchange of warrants (in shares) |  |  |  | 7,181,134 |  |  |  |  |  |  | 4,683,349
Warrants and rights outstanding |  |  |  | $ 116,700 |  |  |  |  |  |  |

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