XML 85 R70.htm IDEA: XBRL DOCUMENT v3.21.2

Commitments and Contingencies (Details Narrative)	May 24, 2021 USD ($)	Sep. 22, 2020 USD ($)	Aug. 28, 2018 USD ($)	Oct. 31, 2021 USD ($)	Apr. 30, 2021 USD ($)	Jan. 25, 2021 EUR (€)	Oct. 31, 2020 EUR (€)	Jul. 31, 2020 USD ($)	Jul. 31, 2020 EUR (€)	Apr. 30, 2020 USD ($)	Apr. 30, 2020 EUR (€)
Selling, General and Administrative [Member] | Recorded Additional Penalty [Member]
Income tax examination, penalties and interest accrued				$ 154,000
Selling, General and Administrative [Member] | Euro [Member] | Recorded Additional Penalty [Member]
Income tax examination, penalties and interest accrued | €							€ 117,146
Selling, General and Administrative [Member] | Tax Authority, Spain [Member]
Income tax examination, penalties and interest accrued					$ 177,000			$ 331,000		$ 177,000
Selling, General and Administrative [Member] | Tax Authority, Spain [Member] | Euro [Member]
Income tax examination, penalties and interest accrued | €									€ 279,870
Selling, General and Administrative [Member] | Tax Authority, Spain [Member] | Euro [Member]
Income tax examination, penalties and interest accrued | €						€ 279,870					€ 162,724
Charles F. Dunleavy [Member]
Damages sought value		$ 438,255	$ 5,000,000
Charles F. Dunleavy [Member] | Subsequent Event [Member]
Damages sought value	$ 1,223,963

X

- Definition

The amount of estimated penalties and interest accrued as of the balance sheet date arising from income tax examinations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32718-109319

+ Details

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

X

- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 9
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14557-108349

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349

+ Details

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

X

- Details

Name:	us-gaap_IncomeStatementLocationAxis=us-gaap_SellingGeneralAndAdministrativeExpensesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_StatementScenarioAxis=OPTT_RecordedAdditionalPenaltyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AwardTypeAxis=OPTT_EURMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_IncomeTaxAuthorityNameAxis=us-gaap_TaxAuthoritySpainMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AwardTypeAxis=currency_EUR
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=OPTT_CharlesFDunleavyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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