Expense Example - Eagle Energy Infrastructure Fund	Aug. 25, 2026 USD ($)
Eagle Energy Infrastructure Fund Class A Shares
Prospectus [Line Items]
Expense Example, with Redemption, 1 Year	$ 733
Expense Example, with Redemption, 3 Years	1,115
Expense Example, with Redemption, 5 Years	1,521
Expense Example, with Redemption, 10 Years	2,650
Eagle Energy Infrastructure Fund Class C Shares
Prospectus [Line Items]
Expense Example, with Redemption, 1 Year	243
Expense Example, with Redemption, 3 Years	800
Expense Example, with Redemption, 5 Years	1,383
Expense Example, with Redemption, 10 Years	2,965
Eagle Energy Infrastructure Fund Class I Shares
Prospectus [Line Items]
Expense Example, with Redemption, 1 Year	143
Expense Example, with Redemption, 3 Years	496
Expense Example, with Redemption, 5 Years	873
Expense Example, with Redemption, 10 Years	$ 1,934

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A
-Section 3
-Subsection instruction
-Paragraph 4

Name:	oef_ExpenseExampleYear01
Namespace Prefix:	oef_
Data Type:	dtr-types:nonNegativeMonetaryItemType
Balance Type:	na
Period Type:	duration

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A
-Section 3
-Subsection instruction
-Paragraph 4

Name:	oef_ExpenseExampleYear03
Namespace Prefix:	oef_
Data Type:	dtr-types:nonNegativeMonetaryItemType
Balance Type:	na
Period Type:	duration

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A
-Section 3
-Subsection instruction
-Paragraph 4

Name:	oef_ExpenseExampleYear05
Namespace Prefix:	oef_
Data Type:	dtr-types:nonNegativeMonetaryItemType
Balance Type:	na
Period Type:	duration

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A
-Section 3
-Subsection instruction
-Paragraph 4

Name:	oef_ExpenseExampleYear10
Namespace Prefix:	oef_
Data Type:	dtr-types:nonNegativeMonetaryItemType
Balance Type:	na
Period Type:	duration

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A
-Section 1
-Subsection a

Name:	dei_LegalEntityAxis=nlfun_S000036854Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: