Percentage of interest expense directly attributable to an award in settlement of litigation.

No definition available.

Name:	GNBT_InterestPerAnnumFailureToPaySettlement
Namespace Prefix:	GNBT_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The equity interest in CBI owned by the Company.

+ References

No definition available.

+ Details

Name:	GNBT_SharesOfCbiOwnedByCompany
Namespace Prefix:	GNBT_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The equity interest in CBI owned by a Former Business Associate.

+ References

No definition available.

+ Details

Name:	GNBT_SharesOfCbiOwnedByFormerBusinessAssociate
Namespace Prefix:	GNBT_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The amount or range of possible amounts of gain that could be realized upon the resolution of a contingency.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 30

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6397426&loc=d3e17499-108355

+ Details

Name:	us-gaap_GainContingencyUnrecordedAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of judgment or settlement awarded to (against) the entity in respect of litigation.

+ References

No definition available.

+ Details

Name:	us-gaap_LitigationSettlementAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Interest expense (income) directly attributable to an award in settlement of litigation.

+ References

No definition available.

+ Details

Name:	us-gaap_LitigationSettlementInterest
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The value (monetary amount) of the award the plaintiff seeks in the legal matter.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 4

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 9

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14557-108349

+ Details

Name:	us-gaap_LossContingencyDamagesSoughtValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

States the date the complaint was formally filed in a court of law, in arbitration or mediation.

+ References

+ Details

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

- Definition

Identifies the plaintiff in the lawsuit.

+ References

+ Details

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

- Details

Name:	us-gaap_LitigationCaseAxis=GNBT_BreachOfContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LitigationCaseAxis=GNBT_DamagesForUnpaidInvoicesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LitigationCaseAxis=GNBT_PunitiveDamagesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LitigationCaseAxis=GNBT_TerminationOfEmployeeMember
Namespace Prefix:
Data Type:	na
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Commitments and Contingencies (Details Narrative) (USD $)	12 Months Ended
	Jul. 31, 2011	Nov. 16, 2012	Jul. 31, 2012	Jul. 20, 2001	May 20, 2011
Shares of CBI owned by former business associate				50.00%
Shares of CBI owned by Company				50.00%GNBT_SharesOfCbiOwnedByCompany
Termination Of Employee
Value of damages sought	$ 7,000,000
Counterclaim proceeding					2,300,000
Lawsuit filing date	20-May-11
Name of Plaintiff	Ms. Perri
Breach of contract and detinue
Value of damages sought	550,000
Counterclaim proceeding	200,000
Lawsuit filing date	1-Jun-11
Name of Plaintiff	Golden Bull Estates
Punitive Damages
Value of damages sought	50,000
Damages for Unpaid Invoices
Value of damages sought			429,000
Lawsuit filing date			31-Dec-11
Name of Plaintiff			Vendor
Settlement of litigation		125,000
Interest per annum, failure to pay settlement			3.00%
Fixed cost per annum, failure to pay settlement			$ 25,000