Equity Incentive Plans - Schedule of Stock Option Plan Activity (Parenthetical) (Details) - shares	12 Months Ended
Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Number of canceled options excluded	52,463	41,688	1,052

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.

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