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Marketable Investment Securities - Schedule of Available-for-Sale Debt Securities (Details) - U.S. government securities - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Debt Securities, Available-for-Sale, Amortized Cost [Abstract]
Available-for-Sale, Amortized Cost, Total	$ 187,255	$ 169,636
Available-for-Sale, Unrealized Gains	242	244
Available-for-Sale, Unrealized Losses	(2)	(14)
Available-for-Sale, Estimated Fair Value	187,495	169,866
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss [Abstract]
Held-to-Maturity, Amortized Cost, Total	5,584	0
Held-to-Maturity, Unrealized Gains	9	0
Held-to-Maturity, Unrealized Losses	0	0
Held-to-Maturity, Estimated Fair Value	5,593	0
Amortized Cost	192,839	169,636
Unrealized Gains	251	244
Unrealized Losses	(2)	(14)
Estimated Fair Value	$ 193,088	$ 169,866

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