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Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Thousands		1 Months Ended		12 Months Ended
	Dec. 02, 2020	Sep. 30, 2020	Aug. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Oct. 31, 2020
Loss Contingencies [Line Items]
Rent expense				$ 1,700	$ 2,100
Research and development				$ 10,818	10,468
Revenue Share Agreement | Oncimmune Limited
Loss Contingencies [Line Items]
Percentage of revenue share payment related to acquired diagnostic test recognized revenue for non-screening tests				8.00%
Minimum annual volume percentage thereafter				5.00%
Period of escalations of sales				through the first four years of sales
Revenue share expenses				$ 300
Bio-Rad License
Loss Contingencies [Line Items]
Percentage of royalty payments on net revenue			2.50%
License expiry date			2024-08
Royalty expense				100	100
AVEO Oncology
Loss Contingencies [Line Items]
Remaining estimated obligation	$ 300
Research and development				$ 900	$ 900
AVEO Oncology | NSCLC POC Trial
Loss Contingencies [Line Items]
Responsible percentage of development and regulatory costs						50.00%
Ficlatuzumab | AVEO Oncology
Loss Contingencies [Line Items]
Percentage of development and regulatory costs exercised using opt-out right		50.00%
Percentage of royalty payments on net sales	10.00%
Percentage of license income generated from licensing	25.00%
BDX004 | Ficlatuzumab | AVEO Oncology | POC Clinical Trials
Loss Contingencies [Line Items]
Responsible percentage of development and regulatory costs						50.00%

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