v3.23.3

ACCRUED EXPENSES AND OTHER (Narrative) (Details)	6 Months Ended
	Sep. 30, 2023
Minimum
Product Warranty Liability [Line Items]
Limited warranty term	1 year
Maximum [Member]
Product Warranty Liability [Line Items]
Limited warranty term	10 years

X

- Definition

Limited Product Warranty, Term

+ References

No definition available.

+ Details

Name:	oesx_LimitedProductWarrantyTerm
Namespace Prefix:	oesx_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_ProductWarrantyLiabilityLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: