Equity Incentive Plans - Summary of Stock Option Activity (Parenthetical) (Details)	9 Months Ended
Sep. 30, 2019 shares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Number of subject to canceled options excluded	123,680

Options forfeited from legacy share based compensation plans that are excluded from returning back to the current share based compensation plan available for future grant.

No definition available.

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Namespace Prefix:	adro_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration