Income Taxes (Components of Deferred Tax Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Deferred tax assets:
Net operating loss carryforwards	$ 53,618	$ 46,591
Capitalized research and development	24,045	21,431
Stock-based compensation	1,804	2,083
Depreciation and amortization	762	856
Lease accounting	13,505	13,899
Interest expense carryforward	1,292
Other	2,086	1,907
Total deferred tax assets before valuation allowance	97,112	86,767
Less: valuation allowance	(84,217)	(75,166)
Total deferred tax assets after valuation allowance	12,895	11,601
Deferred tax liabilities:
Right-of-use asset	(10,763)	(11,510)
In-process research and development	(3,077)	(3,077)
Debt basis differences	(1,991)
Other	(141)	(91)
Total deferred tax liabilities	(15,972)	(14,678)
Net deferred tax liability	$ (3,077)	$ (3,077)