It represents the percentage rate of options and warrants.

No definition available.

Name:	opnt_PercentageOfOptionsAndWarrants
Namespace Prefix:	opnt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- 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

Amount of other increase (decrease) in additional paid in capital (APIC).

+ References

No definition available.

+ Details

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

- Definition

Face amount or stated value per share of common stock.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_CommonStockParOrStatedValuePerShare
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

- Definition

Number of shares (or other type of equity) forfeited during the period.

+ References

No definition available.

+ Details

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

- Details

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

- Details

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

Related Party Transactions (Details Textual) - USD ($)	1 Months Ended	9 Months Ended
Related Party Transactions (Details Textual) - USD ($)	Mar. 31, 2017	Apr. 30, 2017	Apr. 30, 2016	Jul. 31, 2016
Related Party Transaction [Line Items]
Adjustments to Additional Paid in Capital, Other		$ 761,826	$ 0
Common Stock, Par or Stated Value Per Share		$ 0.001		$ 0.001
Board of Directors Chairman [Member]
Related Party Transaction [Line Items]
Related Party Transaction Penalty Rate	35.00%
Adjustments to Additional Paid in Capital, Other	$ 175,498
Stock Issued During Period, Shares, Share-based Compensation, Forfeited	680,000
Common Stock, Par or Stated Value Per Share	$ 0.001
Percentage of Options and Warrants	55.00%
Chief Executive Officer [Member]
Related Party Transaction [Line Items]
Related Party Transaction Penalty Rate	35.00%
Adjustments to Additional Paid in Capital, Other	$ 586,328
Stock Issued During Period, Shares, Share-based Compensation, Forfeited	825,000
Common Stock, Par or Stated Value Per Share	$ 0.001
Percentage of Options and Warrants	55.00%