Percentage interest in asset.

No definition available.

Name:	opnt_PercentageInterestInAsset
Namespace Prefix:	opnt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Identify the stated penalty interest rate per the agreement, for example, leasing and debt arrangements between related parties.

+ References

No definition available.

+ Details

Name:	opnt_RelatedPartyTransactionPenaltyRate
Namespace Prefix:	opnt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of stock to be issued upon occurrence of various milestones under letter of intent.

+ References

No definition available.

+ Details

Name:	opnt_StockToBeIssued
Namespace Prefix:	opnt_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of deferred revenue recognized for transactions arising during the current reporting period. Deferred revenue is a liability as of the balance sheet date related to a revenue producing activity for which revenue has not yet been recognized. Generally, an Entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 605
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 13.A.4(a).Q1)
-URI http://asc.fasb.org/extlink&oid=27012821&loc=d3e214044-122780

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 13
-Section A

+ Details

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

- Definition

The net cash inflow or outflow from other financing activities. This element is used when there is not a more specific and appropriate element in the taxonomy.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
-URI http://asc.fasb.org/extlink&oid=6513228

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3095-108585

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3098-108585

+ Details

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

- Definition

Identify the stated interest rate per the agreement, for example, leasing and debt arrangements between related parties.

+ References

No definition available.

+ Details

Name:	us-gaap_RelatedPartyTransactionRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of shares of stock issued as of the balance sheet date, including shares that had been issued and were previously outstanding but which are now held in the treasury.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

+ Details

Name:	us-gaap_SharesIssued
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of shares issued in lieu of cash for services contributed to the entity. Number of shares includes, but is not limited to, shares issued for services contributed by vendors and founders.

+ References

No definition available.

+ Details

Name:	us-gaap_StockIssuedDuringPeriodSharesIssuedForServices
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of shares of stock issued during the period that is attributable to transactions involving issuance of stock not separately disclosed.

+ References

No definition available.

+ Details

Name:	us-gaap_StockIssuedDuringPeriodSharesOther
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of shares of stock issued during the period as part of a transaction to acquire assets that do not qualify as a business combination.

+ References

No definition available.

+ Details

Name:	us-gaap_StockIssuedDuringPeriodSharesPurchaseOfAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Value of stock issued in lieu of cash for services contributed to the entity. Value of the stock issued includes, but is not limited to, services contributed by vendors and founders.

+ References

No definition available.

+ Details

Name:	us-gaap_StockIssuedDuringPeriodValueIssuedForServices
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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:	us-gaap_TitleOfIndividualAxis=opnt_ConsuntantMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_TitleOfIndividualAxis=us-gaap_ExecutiveOfficerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Subsequent Events (Details Textual) - USD ($)												1 Months Ended																													3 Months Ended	6 Months Ended		12 Months Ended
Subsequent Events (Details Textual) - USD ($)	Mar. 08, 2016	Mar. 07, 2016	Dec. 08, 2015	Oct. 06, 2015	Nov. 13, 2014	Sep. 09, 2014	Sep. 08, 2014	Aug. 13, 2014	May. 15, 2014	Apr. 07, 2014	Aug. 12, 2013	Feb. 29, 2016	Jan. 31, 2016	Dec. 23, 2015	Sep. 30, 2015	Sep. 22, 2015	Sep. 02, 2015	Jul. 31, 2015	Jul. 20, 2015	Apr. 30, 2015	Mar. 31, 2015	Feb. 17, 2015	Jan. 31, 2015	Dec. 31, 2014	Oct. 31, 2014	Sep. 17, 2014	Aug. 31, 2014	Jul. 28, 2014	Jul. 22, 2014	Jan. 23, 2014	Dec. 23, 2013	Dec. 17, 2013	Nov. 30, 2013	Oct. 31, 2013	Oct. 25, 2013	Oct. 21, 2013	Sep. 18, 2013	Aug. 28, 2013	May. 30, 2013	Apr. 16, 2013	Jan. 31, 2016	Jan. 31, 2016	Jan. 31, 2015	Jul. 31, 2015	Jul. 31, 2014	Mar. 25, 2016	Mar. 21, 2016
Subsequent Event [Line Items]
Stock to Be Issued																																									75,000
Stock Issued During Period, Shares, Purchase of Assets																																									10,746
Stock Issued During Period, Value, Issued for Services										$ 15,049	$ 15,000							$ 5,840		$ 8,994	$ 141,130		$ 19,720	$ 91,258			$ 44,723			$ 20,651	$ 21,750		$ 66,500	$ 15,750	$ 13,382	$ 9,036	$ 22,500	$ 35,000				$ 456,483		$ 311,665	$ 213,967
Stock Issued During Period, Shares, Issued for Services										3,762	3,750							800		1,232	20,900		5,000	24,015			7,846			3,333	3,750		12,500	3,750	3,346	2,259	3,750	5,000
Deferred Revenue, Additions				$ 618,000										$ 715,500		$ 1,600,000												$ 111,470	$ 3,000,000														$ 1,000,000
Percentage Interest In Asset			0.75%	0.824%	2.06723%	0.98%	0.88891%	0.84469%	1.50%					0.954%		2.1333%			0.50%			1.97609%	1.50%		0.98%	1.00%		0.22294%	6.00%			0.50%							1.50%	6.00%			1.50%
Proceeds from (Payments for) Other Financing Activities			$ 500,000		$ 1,033,614	$ 500,000	$ 444,530	$ 422,344	$ 300,000										$ 250,000			$ 988,043			$ 500,000	$ 500,000						$ 250,000							$ 150,000	$ 600,000
Consuntant [Member]
Subsequent Event [Line Items]
Stock Issued During Period, Shares, Other																																												10,000
Subsequent Event [Member]
Subsequent Event [Line Items]
Stock Issued During Period, Value, Issued for Services																	$ 50,000
Stock Issued During Period, Shares, Issued for Services																	10,000
Deferred Revenue, Additions																$ 1,600,000
Percentage Interest In Asset				0.824%												2.1333%	1.00%
Proceeds from (Payments for) Other Financing Activities				$ 618,000													$ 535,000
Shares, Issued																																														15,715	9,000
Subsequent Event [Member] \| Aegis Therapeutics, LLC [Member]
Subsequent Event [Line Items]
Stock to Be Issued				75,000
Stock Issued During Period, Shares, Other				13,697
Subsequent Event [Member] \| Consuntant [Member]
Subsequent Event [Line Items]
Stock Issued During Period, Value, Issued for Services		$ 2,500,000
Stock Issued During Period, Shares, Issued for Services	3,582											5,500
Subsequent Event [Member] \| Executive Officer [Member]
Subsequent Event [Line Items]
Proceeds from (Payments for) Other Financing Activities															$ 151,191
Related Party Transaction, Rate													10.00%		6.00%
Related Party Transaction Penalty Rate													4.00%																												4.00%	4.00%