Fair Value Measurements (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Liabilities:
Kolltan acquisition contingent consideration		$ 6,862
Fair value \| Level 3
Liabilities:
Kolltan acquisition contingent consideration	$ 0	6,862
Fair Value Measurements. \| Level 1
Assets:
Money market funds and cash equivalents	0
Marketable securities	0
Total financial assets at fair value	0
Liabilities:
Kolltan acquisition contingent consideration	0
Total financial liabilities at fair value	0
Fair Value Measurements. \| Level 2
Assets:
Money market funds and cash equivalents	7,114	26,220
Marketable securities	328,416	369,107
Total financial assets at fair value	335,530	395,327
Liabilities:
Kolltan acquisition contingent consideration	0
Total financial liabilities at fair value	0
Fair Value Measurements. \| Level 3
Assets:
Money market funds and cash equivalents	0
Marketable securities	0
Total financial assets at fair value	0
Liabilities:
Kolltan acquisition contingent consideration	0	6,862
Total financial liabilities at fair value	0	6,862
Fair Value Measurements. \| Fair value
Assets:
Money market funds and cash equivalents	7,114	26,220
Marketable securities	328,416	369,107
Total financial assets at fair value	335,530	395,327
Liabilities:
Kolltan acquisition contingent consideration	0	6,862
Total financial liabilities at fair value	$ 0	$ 6,862

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Amount of liability recognized arising from contingent consideration in a business combination.

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Fair value of financial and nonfinancial obligations.

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Amount of investment in marketable security.

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