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Prepaid Expenses and Other Current Assets (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Prepaid Expenses and Other Current Assets    
Prepaid insurance $ 1,319 $ 1,766
Prepaid subscriptions and licenses 537 291
Prepaid research contracts 24 239
Prepaid clinical trial costs   916
Other 467 223
Total $ 2,347 $ 3,435