v3.25.2

Insider Trading Arrangements	12 Months Ended
Insider Trading Arrangements	Apr. 30, 2025
Insider Trading Arrangements [Line Items]
No Insider Trading Flag	true

X

- Definition

No insider trading flag.

+ References

No definition available.

+ Details

Name:	OPTT_NoInsiderTradingFlag
Namespace Prefix:	OPTT_
Data Type:	xbrli:booleanItemType
Balance Type:	na
Period Type:	duration

X

- References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-K
-Number 229
-Section 408
-Subsection a

+ Details

Name:	ecd_InsiderTradingArrLineItems
Namespace Prefix:	ecd_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration