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Investments

6 Months Ended

Jun. 30, 2023

Investments, Debt and Equity Securities [Abstract]

Investments

Note 5.  Investments

The following table provides amortized costs, gross unrealized gains and losses, and fair values for the Company’s investments in available-for-sale marketable debt securities as of June 30, 2023, which have maturity dates that range from 1 month to 11 months. There were no realized gains or losses for the three and six months ended June 30, 2023.

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​	​	​	​	​	​	​	​	​	​	​	​
June 30, 2023	​	​	​	Gross		​	Gross		​	​	​
(in thousands)	Amortized Cost			Unrealized Gains			Unrealized Losses			Fair Value
Short-term U.S. treasury securities	$	305,091	​	$	6	​	$	(506)	​	$	304,591
Total	$	305,091	​	$	6	​	$	(506)	​	$	304,591
​	​	​	​	​	​	​	​	​	​	​	​
December 31, 2022	​	​	​	Gross		​	Gross		​	​	​
(in thousands)	Amortized Cost			Unrealized Gains			Unrealized Losses			Fair Value
Short-term U.S. treasury securities	$	283,705	​	$	2	​	$	(247)	​	$	283,460
Total	$	283,705	​	$	2	​	$	(247)	​	$	283,460

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The entire disclosure for investments in certain debt and equity securities.

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