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Balance Sheet Components - Intangibles, net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Mar. 31, 2024
Intangibles, net
Total acquired intangibles	$ 1,118	$ 1,123
Less: accumulated amortization	(873)	(451)
Intangibles, net	245	672	$ 187
Amortization expense	422,000	147,000
Intellectual properties
Intangibles, net
Total acquired intangibles	$ 1,118	943
Intangible assets in process
Intangibles, net
Total acquired intangibles		$ 180

X

- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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