v2.4.0.8
Document and Entity Information
3 Months Ended
Jun. 30, 2014
Aug. 04, 2014
Document and Entity Information [Abstract]    
Entity Registrant Name ORION ENERGY SYSTEMS, INC.  
Entity Central Index Key 0001409375  
Document Type 10-Q  
Document Period End Date Jun. 30, 2014  
Amendment Flag false  
Document Fiscal Year Focus 2015  
Document Fiscal Period Focus Q1  
Current Fiscal Year End Date --03-31  
Entity Filer Category Smaller Reporting Company  
Entity Common Stock, Shares Outstanding   21,777,265