Income Taxes - Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Deferred tax assets:
U.S. Federal and state net operating loss carryforwards	$ 15,819	$ 13,804
Foreign net operating loss carryforwards	7,310	7,819
Research and development tax credits	341	341
Share-based compensation	346	269
Capitalized research expenses	6,967	6,515
Other	180	926
Total deferred tax assets	30,963	29,674
Less: valuation allowance	$ (30,963)	$ (29,674)