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Selected Balance Sheet Information - Schedule of Prepaid expenses and other current assets (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Selected Balance Sheet Information |  |
Receivable from prior owner | $ 1,594 | $ 0
Prepaid insurance | 557 | 803
Prepaid clinical research organizations | 266 | 458
Prepaid consulting, subscriptions and other expenses | 217 | 272
VAT receivable | 127 | 0
Prepaid manufacturing expenses | 102 | 0
Total | $ 2,863 | $ 1,533

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