Represents the anticipated purchase of common shares upon completion of the business combination.

No definition available.

Name:	aphb_AnticipatedPurchaseOfCommonSharesUponCompletionOfMerger
Namespace Prefix:	aphb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The number of common shares issued to each common stock outstanding in consideration for the business combination.

+ References

No definition available.

+ Details

Name:	aphb_BusinessCombinationConsiderationTransferredNumberOfSharesIssuedToEachShareOutstanding
Namespace Prefix:	aphb_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The percenatge of aggregate number of shares of common stock and security holers.

+ References

No definition available.

+ Details

Name:	aphb_CommonStockPercentageOfAggregateNumberOfSharesAndSecurityHolders
Namespace Prefix:	aphb_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Expected purchase price per share of the combined entity pursuant to Share Purchase Agreement.

+ References

No definition available.

+ Details

Name:	aphb_ExpectedPricePerShareOfCombinedEntity
Namespace Prefix:	aphb_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the numerator used for determination of per share price of Share Purchase Agreement.

+ References

No definition available.

+ Details

Name:	aphb_NumeratorForDeterminationOfPerSharePriceOfSharePurchaseAgreement
Namespace Prefix:	aphb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SAB TOPIC 4.C)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187143-122770

+ Details

Name:	us-gaap_StockholdersEquityNoteStockSplitConversionRatio1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

Name:	us-gaap_SubsequentEventLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	dei_LegalEntityAxis=aphb_C3jTherapeuticsIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=aphb_AgreementAndPlanOfMergerAndReorganizationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=aphb_AmpliphiBiosciencesCorpMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementScenarioAxis=us-gaap_ScenarioPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Merger with C3J Therapeutics (Details) - USD ($) $ / shares in Units, $ in Millions	Jan. 03, 2019	Feb. 05, 2019
C3J [Member]
Subsequent Event [Line Items]
Anticipated purchase of common shares upon completion of merger		$ 10.0
Agreement and Plan of Merger and Reorganization [Member] \| C3J [Member]
Subsequent Event [Line Items]
Number of shares issued per common stock outstanding	0.6892
Percentage of ownership	70.00%
Numerator for determination of per share price of Share Purchase Agreement		$ 40.0
Agreement and Plan of Merger and Reorganization [Member] \| Ampliphi Biosciences Corp [Member]
Subsequent Event [Line Items]
Percentage of ownership	30.00%
Agreement and Plan of Merger and Reorganization [Member] \| Minimum [Member]
Subsequent Event [Line Items]
Reverse stock split ratio	0.33
Agreement and Plan of Merger and Reorganization [Member] \| Maximum [Member] \| C3J [Member]
Subsequent Event [Line Items]
Reverse stock split ratio	0.05
Scenario, Plan [Member] \| Agreement and Plan of Merger and Reorganization [Member]
Subsequent Event [Line Items]
Expected price per share of combined entity		$ 0.36