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Revenue from Contracts with Customers (Summary of Disaggregation of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Disaggregation Of Revenue [Line Items]
Revenue	$ 24,066	$ 28,005
Other services [Member]
Disaggregation Of Revenue [Line Items]
Revenue	510	238
Non-cash royalties [Member]
Disaggregation Of Revenue [Line Items]
Revenue	23,556	27,767
United States [Member]
Disaggregation Of Revenue [Line Items]
Revenue	23,556	27,767
United States [Member] | Non-cash royalties [Member]
Disaggregation Of Revenue [Line Items]
Revenue	23,556	27,767
Rest of World [Member]
Disaggregation Of Revenue [Line Items]
Revenue	510	238
Rest of World [Member] | Other services [Member]
Disaggregation Of Revenue [Line Items]
Revenue	$ 510	$ 238

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