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Summary of Significant Accounting Policies - Property and equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Property and equipment
Property and equipment, gross	$ 5,400	$ 5,352
Less accumulated depreciation and amortization	(4,059)	(3,155)
Property and equipment, net	1,341	2,197
Depreciation and amortization expense	903	896	$ 816
Leasehold improvements
Property and equipment
Property and equipment, gross	$ 2,705	2,705
Office equipment
Property and equipment
Useful Life	5 years
Property and equipment, gross	$ 155	107
Computer and software
Property and equipment
Useful Life	3 years
Property and equipment, gross	$ 1,291	1,291
Furniture, fixtures and equipment
Property and equipment
Useful Life	5 years
Property and equipment, gross	$ 1,249	$ 1,249

X

- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

+ References

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- Definition

The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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