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PREPAID EXPENSES AND OTHER CURRENT ASSETS (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] |  |
Insurance | $ 3,482 | $ 107
Vendor advances | 1,103 | 473
Accounts receivable | 517 | 0
Other | 259 | 213
Total prepaid expenses and other current assets | $ 5,361 | $ 793

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