Severance Charge (Details) (USD $)	3 Months Ended
Mar. 31, 2015
Severance Charge [Line Items]
Accrued severance, December 31, 2014	$ 555,000aphb_EmployeeBenefitAccuredLiabilities
Payments in 2015	(122,000)aphb_PaymentsForSeveranceCosts
Accrued severance, March 31, 2015	$ 433,000aphb_EmployeeBenefitAccuredLiabilities

Represents the total cash outflows for employee severance costs during the period.

No definition available.

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