Acquisition of G.Research, LLC (Details)	Jun. 18, 2019 shares
The Morgan Group, Inc. [Member] \| Associated Capital Group [Member]
Acquisition [Abstract]
Percentage of outstanding common stock to be held	91.00%
G.Research, LLC [Member]
Acquisition [Abstract]
Issuance of common stock for acquisition (in shares)	50,000,000

Number of shares of equity interests issued or issuable to acquire entity.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)(4)
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration