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Document and Entity Information
 9 Months Ended
Dec. 31, 2025
Cover [Abstract]  
Entity Registrant Name Orion Energy Systems, Inc.
Entity Central Index Key 0001409375
Document Type 10-Q
Document Period End Date Dec. 31, 2025
Amendment Flag false
Document Fiscal Year Focus 2025
Document Fiscal Period Focus Q3
Current Fiscal Year End Date --03-31
Entity Current Reporting Status Yes
Entity Filer Category Non-accelerated Filer
Entity Shell Company false
Entity Emerging Growth Company false
Entity Small Business true
Entity File Number 001-33887
Entity Tax Identification Number 39-1847269
Entity Address, Address Line One 2210 Woodland Drive
Entity Address, City or Town Manitowoc
Entity Address, State or Province WI
Entity Address, Postal Zip Code 54220
City Area Code 920
Local Phone Number 892-9340
Entity Interactive Data Current Yes
Entity Incorporation, State or Country Code WI
Document Quarterly Report true
Document Transition Report false
Title of 12(b) Security Common stock, no par value
Trading Symbol OESX
Security Exchange Name NASDAQ