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v3.21.1

Prepaid Expenses and Other Assets, Current - Narrative (Details) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2021 USD ($)
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] |
Decrease to prepaid facility and manufacturing | $ (2.7)

X
- Definition Increase (Decrease) To Prepaid Facility And Manufacturing + References No definition available. + Details
Name: | autl_IncreaseDecreaseToPrepaidFacilityAndManufacturing
Namespace Prefix: | autl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DeferredCostsCapitalizedPrepaidAndOtherAssetsDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration