XML 15 R1.htm IDEA: XBRL DOCUMENT v3.24.2
Cover - USD ($)
$ in Millions
 12 Months Ended
Apr. 30, 2024
Jul. 22, 2024
Oct. 31, 2023
Document Type 10-K    
Amendment Flag false    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Apr. 30, 2024    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2024    
Current Fiscal Year End Date --04-30    
Entity File Number 001-33417    
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 Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Public Float     $ 17.6
Entity Common Stock, Shares Outstanding   92,708,981  
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction [Flag] false    
Auditor Firm ID 274    
Auditor Opinion [Text Block] We have audited the accompanying consolidated balance sheets of Ocean Power Technologies, Inc. and Subsidiaries (the “Company”) as of April 30, 2024 and 2023, and the related consolidated statements of operations, comprehensive loss, shareholders’ equity, and cash flows for each of the years then ended, and the related notes (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the consolidated financial position of the Company as of April 30, 2024 and 2023, and the consolidated results of their operations and their cash flows for each of the years then ended, in conformity with accounting principles generally accepted in the United States of America.    
Auditor Name EISNERAMPER LLP    
Auditor Location Iselin, New Jersey    
Common Stock, par value $0.001      
Title of 12(b) Security Common Stock, par value $0.001    
Trading Symbol OPTT    
Security Exchange Name NYSE    
Series A Preferred Stock Purchase Rights      
Title of 12(b) Security Series A Preferred Stock Purchase Rights    
No Trading Symbol Flag true    
Security Exchange Name NYSE