Equity - Substitute Warrants (Details) $ in Thousands		3 Months Ended		9 Months Ended
	May 24, 2021	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)
Class of Stock [Line Items]
Change in fair value of warrant liabilities		$ (26)	$ 37	$ (27)	$ (236)
Merger agreement
Class of Stock [Line Items]
Exchange Ratio	3.16
Merger agreement | Stockholders of NeuroRx
Class of Stock [Line Items]
Exchange Ratio				3.16
Substitute Warrants
Class of Stock [Line Items]
Change in fair value of warrant liabilities			$ (100)		$ (100)
Substitute Warrants | Maximum
Class of Stock [Line Items]
Change in fair value of warrant liabilities				$ 100