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REGULATORY AUTHORITIES - Additional Information (Details)	Jun. 30, 2024 USD ($)	Mar. 31, 2024 USD ($)
LFNY
Regulatory Requirements [Line Items]
Minimum net capital requirement as defined under exchange act	$ 5,000
Aggregate indebtedness to net capital ratio	0.97
Regulatory capital	$ 86,388,000
Regulatory capital in excess of minimum requirement	80,804,000
U.K. Subsidiaries
Regulatory Requirements [Line Items]
Regulatory capital	171,625,000
Regulatory capital in excess of minimum requirement	98,640,000
CFLF
Regulatory Requirements [Line Items]
Regulatory capital		$ 153,263,000
Regulatory capital in excess of minimum requirement		54,335,000
Combined European Regulated Group
Regulatory Requirements [Line Items]
Regulatory capital		176,085,000
Regulatory capital in excess of minimum requirement		$ 68,858,000
Other U.S. and Non-U.S. Subsidiaries
Regulatory Requirements [Line Items]
Regulatory capital	107,788,000
Regulatory capital in excess of minimum requirement	$ 84,389,000

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Regulatory requirements.

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- Definition

Minimum amount of net capital required to be maintained by broker-dealer parent, calculated under Aggregate Indebtedness Standard.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Rule 15c3-1
-Number 240
-Section 15c3-1
-Publisher SEC

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Amount of total capital as defined by regulatory framework.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477270/942-505-50-1

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Amount of total risk-based capital exceeding minimum required for capital adequacy as defined by regulatory framework.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)(1)
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-URI https://asc.fasb.org/1943274/2147477270/942-505-50-1

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