|
Securities Owned and Securities Sold, But Not Yet Purchased (Fair Value Amount) (Details) (USD $)
In Thousands, unless otherwise specified
|
Dec. 31, 2013
|
Dec. 31, 2012
|
| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
|
| Securities owned, at fair value |
$ 4,789
|
$ 2,078
|
| Securities sold, but not yet purchased |
(83)
|
(292)
|
|
Certificates of Deposit [Member]
|
|
|
| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
|
| Securities owned, at fair value |
24
|
14
|
| Securities sold, but not yet purchased |
0
|
0
|
|
Debt Securities [Member]
|
|
|
| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
|
| Securities owned, at fair value |
1,402
|
1,098
|
| Securities sold, but not yet purchased |
(46)
|
(123)
|
|
U.S. Treasury Notes [Member]
|
|
|
| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
|
| Securities owned, at fair value |
1
|
0
|
| Securities sold, but not yet purchased |
0
|
(99)
|
|
Common Stock and Warrants [Member]
|
|
|
| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
|
| Securities owned, at fair value |
689
|
384
|
| Securities sold, but not yet purchased |
(33)
|
(70)
|
|
Other Investments [Member]
|
|
|
| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
|
| Securities owned, at fair value |
1,948
|
|
| Securities sold, but not yet purchased |
0
|
|
|
Fair value disclosure
|
|
|
| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
|
| Securities owned, at fair value |
4,789
|
2,078
|
| Securities sold, but not yet purchased |
(83)
|
(292)
|
|
Fair value disclosure | Level 1 [Member]
|
|
|
| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
|
| Securities owned, at fair value |
713
|
398
|
| Securities sold, but not yet purchased |
(33)
|
(70)
|
|
Fair value disclosure | Level 2 [Member]
|
|
|
| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
|
| Securities owned, at fair value |
4,076
|
1,680
|
| Securities sold, but not yet purchased |
(50)
|
(222)
|
|
Fair value disclosure | Level 3 [Member]
|
|
|
| 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
|
|
Fair value disclosure | Certificates of Deposit [Member]
|
|
|
| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
|
| Securities owned, at fair value |
24
|
14
|
|
Fair value disclosure | Certificates of Deposit [Member] | Level 1 [Member]
|
|
|
| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
|
| Securities owned, at fair value |
24
|
14
|
|
Fair value disclosure | Certificates of Deposit [Member] | Level 2 [Member]
|
|
|
| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
|
| Securities owned, at fair value |
0
|
0
|
|
Fair value disclosure | Certificates of Deposit [Member] | Level 3 [Member]
|
|
|
| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
|
| Securities owned, at fair value |
0
|
0
|
|
Fair value disclosure | Debt Securities [Member]
|
|
|
| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
|
| Securities owned, at fair value |
1,402
|
1,098
|
| Securities sold, but not yet purchased |
(46)
|
(123)
|
|
Fair value disclosure | Debt Securities [Member] | Level 1 [Member]
|
|
|
| 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
|
|
Fair value disclosure | Debt Securities [Member] | Level 2 [Member]
|
|
|
| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
|
| Securities owned, at fair value |
1,402
|
1,098
|
| Securities sold, but not yet purchased |
(46)
|
(123)
|
|
Fair value disclosure | Debt Securities [Member] | Level 3 [Member]
|
|
|
| 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
|
|
Fair value disclosure | U.S. Treasury Notes [Member]
|
|
|
| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
|
| Securities owned, at fair value |
1
|
|
| Securities sold, but not yet purchased |
|
(99)
|
|
Fair value disclosure | U.S. Treasury Notes [Member] | Level 1 [Member]
|
|
|
| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
|
| Securities owned, at fair value |
0
|
|
| Securities sold, but not yet purchased |
|
0
|
|
Fair value disclosure | U.S. Treasury Notes [Member] | Level 2 [Member]
|
|
|
| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
|
| Securities owned, at fair value |
1
|
|
| Securities sold, but not yet purchased |
|
(99)
|
|
Fair value disclosure | U.S. Treasury Notes [Member] | Level 3 [Member]
|
|
|
| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
|
| Securities owned, at fair value |
0
|
|
| Securities sold, but not yet purchased |
|
0
|
|
Fair value disclosure | Common Stock and Warrants [Member]
|
|
|
| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
|
| Securities owned, at fair value |
1,414
|
966
|
| Securities sold, but not yet purchased |
(37)
|
(70)
|
|
Fair value disclosure | Common Stock and Warrants [Member] | Level 1 [Member]
|
|
|
| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
|
| Securities owned, at fair value |
689
|
384
|
| Securities sold, but not yet purchased |
(33)
|
(70)
|
|
Fair value disclosure | Common Stock and Warrants [Member] | Level 2 [Member]
|
|
|
| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
|
| Securities owned, at fair value |
725
|
582
|
| Securities sold, but not yet purchased |
(4)
|
0
|
|
Fair value disclosure | Common Stock and Warrants [Member] | Level 3 [Member]
|
|
|
| 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
|
|
Fair value disclosure | Other Investments [Member]
|
|
|
| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
|
| Securities owned, at fair value |
1,948
|
|
|
Fair value disclosure | Other Investments [Member] | Level 1 [Member]
|
|
|
| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
|
| Securities owned, at fair value |
0
|
|
|
Fair value disclosure | Other Investments [Member] | Level 2 [Member]
|
|
|
| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
|
| Securities owned, at fair value |
1,948
|
|
|
Fair value disclosure | Other Investments [Member] | Level 3 [Member]
|
|
|
| Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items] |
|
|
| Securities owned, at fair value |
$ 0
|
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