Income Taxes - Components of deferred tax assets and liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Deferred tax assets:
Accrued compensation	$ 1,302	$ 678
Federal Credit Carryforwards	0	227
Leases	34	10
Share-based compensation	3,163	637
Research and experimental costs capitalized	9,556	3,504
Net operating loss carryforwards	294	0
Start-up costs	32	35
Valuation allowance	12,888	3,332
Deferred tax assets before valuation allowance	14,381	5,091
DeferredTaxAssetsNet	1,493	1,759
Deferred tax liabilities:
Intangible assets	0	45
Fixed assets	1,481	1,708
Prepaid expenses	12	6
Deferred Tax Liabilities, Gross, Total	1,493	1,759
Deferred Tax Assets, Net, Total	$ 0	$ 0