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

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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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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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Property, Machinery and Equipment (FY) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Property, machinery and equipment, gross	$ 5,240		$ 5,240		$ 5,815	$ 5,808
Less: accumulated depreciation	(2,871)		(2,871)		(2,563)	(1,792)
Property, machinery and equipment, net	2,369		2,369		3,252	4,016
Depreciation expense	200	$ 200	600	$ 600	800	1,000
Computer equipment
Property, Plant and Equipment [Line Items]
Property, machinery and equipment, gross	10		10		10	10
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, machinery and equipment, gross	2,391		2,391		2,394	2,281
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, machinery and equipment, gross	2,839		2,839		3,411	3,411
Property, machinery and equipment, net	$ 300		$ 300
Construction in-progress
Property, Plant and Equipment [Line Items]
Property, machinery and equipment, gross					$ 0	$ 106