Net Loss Per Share (Narrative) (Details) - USD ($)	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Significant Accounting Policies [Abstract]
Change in fair value of November 2016 warrants	$ (55,000)	$ (1,524,000)

Amount of addition (reduction) to the amount at whicha liability could be incurred (settled) in a current transaction between willing parties

No definition available.

Name:	aphb_LiabilitiesFairValueAdjustmentIncludingExercisePriceAdjustment
Namespace Prefix:	aphb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration