|
Securities Owned and Securities Sold, But Not Yet Purchased - Narrative (Details) (USD $)
In Thousands, unless otherwise specified |
Mar. 31, 2015
|
Dec. 31, 2014
|
|---|---|---|
| Schedule of Trading Securities and Other Trading Assets [Line Items] | ||
| Securities owned deposited with the Company's subsidiaries clearing broker | $ 4,433lts_SecuritiesOwnedAndHeldAtClearingBroker | $ 5,429lts_SecuritiesOwnedAndHeldAtClearingBroker |
| Securities owned at fair value | 4,986us-gaap_SecurityOwnedAndSoldNotYetPurchasedFairValueSecurityOwned | 5,910us-gaap_SecurityOwnedAndSoldNotYetPurchasedFairValueSecurityOwned |
| Common stock and warrants | ||
| Schedule of Trading Securities and Other Trading Assets [Line Items] | ||
| Securities owned at fair value |
661us-gaap_SecurityOwnedAndSoldNotYetPurchasedFairValueSecurityOwned / us-gaap_SecurityOwnedAndSoldNotYetPurchasedAtFairValueAxis = lts_CommonStockAndWarrantsMember |
1,981us-gaap_SecurityOwnedAndSoldNotYetPurchasedFairValueSecurityOwned / us-gaap_SecurityOwnedAndSoldNotYetPurchasedAtFairValueAxis = lts_CommonStockAndWarrantsMember |
| Level 2 | ||
| Schedule of Trading Securities and Other Trading Assets [Line Items] | ||
| Securities owned at fair value |
3,844us-gaap_SecurityOwnedAndSoldNotYetPurchasedFairValueSecurityOwned / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member |
3,464us-gaap_SecurityOwnedAndSoldNotYetPurchasedFairValueSecurityOwned / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member |
| Level 2 | Common stock and warrants | Warrants to purchase common stock | ||
| Schedule of Trading Securities and Other Trading Assets [Line Items] | ||
| Securities owned at fair value |
$ 500us-gaap_SecurityOwnedAndSoldNotYetPurchasedFairValueSecurityOwned / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_InvestmentTypeAxis = us-gaap_WarrantMember / us-gaap_SecurityOwnedAndSoldNotYetPurchasedAtFairValueAxis = lts_CommonStockAndWarrantsMember |
$ 403us-gaap_SecurityOwnedAndSoldNotYetPurchasedFairValueSecurityOwned / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_InvestmentTypeAxis = us-gaap_WarrantMember / us-gaap_SecurityOwnedAndSoldNotYetPurchasedAtFairValueAxis = lts_CommonStockAndWarrantsMember |
| X | ||||||||||
|
- Definition
Securities owned and held at clearing broker. No definition available.
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
Fair value of financial instruments held by a broker-dealer for their own account (proprietary securities) for trading or investment purposes determined by management based upon quoted prices of a financial instrument with similar characteristics or on a valuation technique or model. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Details
|