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Description of Business	9 Months Ended
Description of Business	Dec. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
DESCRIPTION OF BUSINESS	DESCRIPTION OF BUSINESS Organization The Company includes Orion Energy Systems, Inc., a Wisconsin corporation, and all consolidated subsidiaries. The Company is a developer, manufacturer and seller of lighting and energy management systems to commercial and industrial businesses, predominantly in North America. See Note J “Segment Reporting” of these financial statements for further discussion of the Company's reportable segments. The Company’s corporate offices and primary manufacturing operations are located in Manitowoc, Wisconsin. The operations facility in Plymouth, Wisconsin was classified as an asset held for sale as of March 31, 2014 and was sold in May 2014. The Company leases office space in Jacksonville, Florida; Chicago, Illinois; and Houston, Texas.