Description of Business and Basis of Presentation - Organization (Details)	12 Months Ended
Dec. 31, 2018 project
Description of Business and Basis of Presentation
Clinical candidates at the pivotal trial stage (in products)	2

The number of the Company's clinical candidates that are at the pivotal trial stage.

No definition available.

Name:	ards_NumberOfCompaniesClinicalCandidatesAtPivotalTrialStage
Namespace Prefix:	ards_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration