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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Intangible Assets - Amortization expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Definite-lived intangible assets
2024	$ 214		$ 214
2025	854		854
2026	855		855
2027	854		854
2028	855		855
Thereafter	2,756		2,756
Total	6,388		6,388		$ 7,028
Cost of sales
Definite-lived intangible assets
Amortization expense	$ 214	$ 214	$ 641	$ 641