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Schedule of Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
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Prepaid Expenses And Other Current Assets |  |
Receivable for common stock warrants proceeds |  | $ 3,258
Prepaid expenses | 723 | 824
Security deposits | 128 | 149
Other | 522 | 756
Total | $ 1,373 | $ 4,987

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