Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Income Tax Disclosure [Abstract]
Expected federal income tax benefit at statutory rate	$ (5,356)	$ (6,320)
Disallowed R&D expenses	3	9
Non-taxable R&D rebate	0	(7)
Other permanent items	235	738
Return to provision	57	47
Stock-based compensation	246	682
Foreign rate differential	(76)	(453)
Other	21	(2)
Effect of change in valuation allowance	4,870	5,306
Income tax benefit	$ 0	$ 0