Accrued Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Accrued Expense
Accrued expense	$ 975	$ 673
Accrued clinical trial expenses	400
Accrued Vacation And Bonus	400	400
Manufacturing expense	100
Accrued Clinical And Preclinical Expenses		200
Other Accrued Liabilities	$ 100	$ 100