Accrued Expense (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Accrued expenses	$ 1,984	$ 1,346
Current Liabilities
Accrued clinical trial expenses	1,400	800
Accrued employee vacation and bonus expenses	200	200
Accrued legal and patent fees	200	100
Accrued professional and consulting fees	100	100
Accrued other expenses	$ 100	$ 100