Securities Owned and Securities Sold, But Not Yet Purchased at Fair Value (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Sep. 30, 2015
Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items]
Securities owned at fair value	$ 708	$ 887
Level 1
Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items]
Securities owned at fair value	523	682
Level 2
Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items]
Securities owned at fair value	149	205
Level 3
Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items]
Securities owned at fair value	36	0
Corporate stocks
Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items]
Securities owned at fair value	44	44
Securities sold, not yet purchased at fair value	5	32
Corporate stocks | Level 1
Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items]
Securities owned at fair value	44	44
Securities sold, not yet purchased at fair value	5	32
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	479	638
Municipal bonds | Level 1
Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items]
Securities owned at fair value	479	638
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 and warrants
Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items]
Securities owned at fair value	185	205
Restricted stock and warrants | Level 1
Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items]
Securities owned at fair value	0	0
Restricted stock and warrants | Level 2
Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items]
Securities owned at fair value	149	205
Restricted stock and warrants | Level 3
Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items]
Securities owned at fair value	$ 36	$ 0