Accounts Payable and Accrued Expenses (Schedule of Accounts Payable and Accrued Expenses) (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Accounts Payable and Accrued Expenses
Accounts payable	$ 7,005	$ 3,512
Research and development	1,794	3,083
Accrued compensation	3,247	2,595
Other	764	554
Total accounts payable and accrued expenses	$ 12,810	$ 9,744