XML 89 R74.htm IDEA: XBRL DOCUMENT
v3.21.2

Acquisition of 3dent Technologies, LLC - Schedule of Fair Value of Indetifiable Intangible Assets Acquired (Details) - 3Dent Acquisition [Member] $ in Thousands | Feb. 01, 2021 USD ($)
--- | ---
Fair value of identifiable intangible assets | $ 280
Trade Names [Member] |
Fair value of identifiable intangible assets | 130
Customer Relationship [Member] |
Fair value of identifiable intangible assets | $ 150

X
- Definition Amount of increase in assets, excluding financial assets and goodwill, lacking physical substance with an indefinite life, from an acquisition. + References No definition available. + Details
Name: | us-gaap_IndefinitelivedIntangibleAssetsAcquired
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=OPTT_ThreeDentAcquisitionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_TradeNamesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_CustomerRelationshipsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |