ORGANIZATION AND BASIS OF PRESENTATION (Details) $ / shares in Units, $ in Millions						3 Months Ended
	Sep. 29, 2014 $ / shares	Sep. 29, 2014 $ / shares	Sep. 29, 2014 $ / shares shares	Sep. 29, 2014 right $ / shares	Sep. 29, 2014 USD ($) $ / shares	Mar. 31, 2017 segment
Organization And Basis Of Presentation [Line Items]
Number of reportable segments | segment						1
Date of incorporation						Jun. 13, 2014
Commencement of operations date	Sep. 29, 2014
Transfer of units to common stock, prior to fourth anniversary						33.33%
Transfer of units to common stock, prior to fifth anniversary						66.66%
Medley LLC [Member]
Organization And Basis Of Presentation [Line Items]
Conversion of pre-IPO interests to LLC Units (in shares)			23,333,333
Basis of exchange of LLC Units for Class A shares						exchange their LLC Units for shares of Medley Management Inc.’s Class A common stock on a one-for-one basis
Common Class A [Member]
Organization And Basis Of Presentation [Line Items]
Proceeds from Initial Public Offering | $					$ 100.4
Issuance of Class A shares in Initial Public Offering, net of underwriters discount (in shares)			6,000,000
Issuance of Class A shares, offering price (in dollars per share) | $ / shares	$ 18.00	$ 18.00	$ 18.00	$ 18.00	$ 18.00
Percentage of common stock owned by LLC personnel for voting rights entitlement, minimum		10.00%
Common stock exchange ratio						1
Common Class B [Member]
Organization And Basis Of Presentation [Line Items]
Issuance of Class A shares in Initial Public Offering, net of underwriters discount (in shares)			100
Voting rights multiplier upon LLC ownership threshold		10		10