SECURITIES OWNED AND SECURITIES SOLD, BUT NOT YET PURCHASED AT FAIR VALUE (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Sep. 30, 2016
Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items]
Securities owned at fair value	$ 1,206	$ 2,357
Level 1
Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items]
Securities owned at fair value	1,102	2,212
Level 2
Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items]
Securities owned at fair value	104	145
Level 3
Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items]
Securities owned at fair value	0	0
Corporate stocks
Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items]
Securities owned at fair value	172	101
Securities sold, not yet purchased at fair value	1	298
Corporate stocks | Level 1
Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items]
Securities owned at fair value	172	101
Securities sold, not yet purchased at fair value	1	298
Corporate stocks | Level 2
Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items]
Securities owned at fair value	0	0
Securities sold, not yet purchased at fair value	0	0
Corporate stocks | Level 3
Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items]
Securities owned at fair value	0	0
Securities sold, not yet purchased at fair value	0	0
Municipal bonds
Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items]
Securities owned at fair value	930	2,111
Municipal bonds | Level 1
Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items]
Securities owned at fair value	930	2,111
Municipal bonds | Level 2
Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items]
Securities owned at fair value	0	0
Municipal bonds | Level 3
Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items]
Securities owned at fair value	0	0
Restricted stock
Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items]
Securities owned at fair value	104	145
Restricted stock | Level 1
Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items]
Securities owned at fair value	0	0
Restricted stock | Level 2
Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items]
Securities owned at fair value	104	145
Restricted stock | Level 3
Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items]
Securities owned at fair value	$ 0	$ 0