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Cover
Sep. 06, 2024
Entity Addresses [Line Items]  
Document Type S-3/A
Amendment Flag true
Amendment Description Amendment No. 1
Entity Registrant Name Ocean Power Technologies, Inc.
Entity Central Index Key 0001378140
Entity Tax Identification Number 22-2535818
Entity Incorporation, State or Country Code DE
Entity Address, Address Line One 28 Engelhard Drive
Entity Address, Address Line Two Suite B
Entity Address, City or Town Monroe Township
Entity Address, State or Province NJ
Entity Address, Postal Zip Code 08831
City Area Code (609)
Local Phone Number 730-0400
Entity Filer Category Non-accelerated Filer
Entity Small Business true
Entity Emerging Growth Company false
Business Contact [Member]  
Entity Addresses [Line Items]  
Entity Address, Address Line One 28 Engelhard Drive
Entity Address, Address Line Two Suite B
Entity Address, City or Town Monroe Township
Entity Address, State or Province NJ
Entity Address, Postal Zip Code 08831
City Area Code (609)
Local Phone Number 730-0400
Contact Personnel Name Philipp Stratmann