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Securities Owned and Securities Sold, But Not Yet Purchased - Additional Information (Details) (USD $)
In Thousands, unless otherwise specified
|
Sep. 30, 2014
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Dec. 31, 2013
|
| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
|
| Securities owned at fair value |
$ 5,858
|
$ 4,789
|
| Securities sold, but not yet purchased |
(3,434)
|
(83)
|
|
Level 1
|
|
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| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
|
| Securities owned at fair value |
1,805
|
713
|
| Securities sold, but not yet purchased |
(3,071)
|
(33)
|
|
Level 2
|
|
|
| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
|
| Securities owned at fair value |
4,053
|
4,076
|
| Securities sold, but not yet purchased |
(363)
|
(50)
|
|
Level 3
|
|
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| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
|
| Securities owned at fair value |
0
|
0
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| Securities sold, but not yet purchased |
0
|
0
|
|
Debt securities
|
|
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| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
|
| Securities owned at fair value |
1,896
|
1,402
|
| Securities sold, but not yet purchased |
(66)
|
(46)
|
|
Debt securities | Level 1
|
|
|
| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
|
| Securities owned at fair value |
0
|
0
|
| Securities sold, but not yet purchased |
|
0
|
|
Debt securities | Level 2
|
|
|
| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
|
| Securities owned at fair value |
1,896
|
1,402
|
| Securities sold, but not yet purchased |
|
(46)
|
|
Debt securities | Level 3
|
|
|
| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
|
| Securities owned at fair value |
0
|
0
|
| Securities sold, but not yet purchased |
|
0
|
|
Certificates of deposit
|
|
|
| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
|
| Securities owned at fair value |
|
24
|
| Securities sold, but not yet purchased |
(66)
|
0
|
|
Certificates of deposit | Level 1
|
|
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| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
|
| Securities owned at fair value |
|
24
|
| Securities sold, but not yet purchased |
0
|
|
|
Certificates of deposit | Level 2
|
|
|
| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
|
| Securities owned at fair value |
|
0
|
| Securities sold, but not yet purchased |
(66)
|
|
|
Certificates of deposit | Level 3
|
|
|
| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
|
| Securities owned at fair value |
|
0
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| Securities sold, but not yet purchased |
0
|
|
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U.S. Treasury notes
|
|
|
| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
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| Securities owned at fair value |
1
|
1
|
| Securities sold, but not yet purchased |
(297)
|
0
|
|
U.S. Treasury notes | Level 1
|
|
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| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
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| Securities owned at fair value |
0
|
0
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| Securities sold, but not yet purchased |
0
|
|
|
U.S. Treasury notes | Level 2
|
|
|
| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
|
| Securities owned at fair value |
1
|
1
|
| Securities sold, but not yet purchased |
(297)
|
|
|
U.S. Treasury notes | Level 3
|
|
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| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
|
| Securities owned at fair value |
0
|
0
|
| Securities sold, but not yet purchased |
0
|
|
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Common stock and warrants
|
|
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| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
|
| Securities owned at fair value |
1,805
|
689
|
| Securities sold, but not yet purchased |
(3,071)
|
(33)
|
|
Other investments
|
|
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| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
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| Securities owned at fair value |
1,025
|
1,948
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| Securities sold, but not yet purchased |
0
|
0
|
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Other investments | Level 1
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|
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| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
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| Securities owned at fair value |
0
|
0
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|
Other investments | Level 2
|
|
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| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
|
| Securities owned at fair value |
1,025
|
1,948
|
|
Other investments | Level 3
|
|
|
| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
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| Securities owned at fair value |
0
|
0
|
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Common stock, restricted common stock and warrants
|
|
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| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
|
| Securities owned at fair value |
2,936
|
1,414
|
| Securities sold, but not yet purchased |
(3,071)
|
(37)
|
|
Common stock, restricted common stock and warrants | Level 1
|
|
|
| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
|
| Securities owned at fair value |
1,805
|
689
|
| Securities sold, but not yet purchased |
(3,071)
|
(33)
|
|
Common stock, restricted common stock and warrants | Level 2
|
|
|
| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
|
| Securities owned at fair value |
1,131
|
725
|
| Securities sold, but not yet purchased |
0
|
(4)
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|
Common stock, restricted common stock and warrants | Level 3
|
|
|
| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
|
| Securities owned at fair value |
0
|
0
|
| Securities sold, but not yet purchased |
$ 0
|
$ 0
|