Liquidity and Going Concern Considerations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Liquidity and Going Concern Considerations [Abstract]
Accumulated deficit	$ 397,198	$ 388,759
Stockholders' equity	21,291	14,106	$ 2,535
Cash and cash equivalents and investments available-for-sale	10,900
Working capital	12,100
Net cash used in operating activities	9,412	$ 16,929
Remaining consideration on ATM facility	$ 11,000