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Accrued Liabilities - Additional Information (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Payables And Accruals [Abstract]
Accrued tax withholding liability related to unsettled option exercises	$ 1.4	$ 1.9

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- Definition

Accrued tax withholding liability related to unsettled option exercises.

+ References

No definition available.

+ Details

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Namespace Prefix:	adpt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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- References

No definition available.

+ Details

Name:	us-gaap_PayablesAndAccrualsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration