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Commitments and Contingencies - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
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1 Months Ended |
3 Months Ended |
2 Months Ended |
16 Months Ended |
2 Months Ended |
0 Months Ended |
13 Months Ended |
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Oct. 31, 2011
subsidiary
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Mar. 31, 2015
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Jan. 31, 2015
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Sep. 30, 2014
employee
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Apr. 30, 2015
plaintiffs
claim
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Oct. 17, 2014
employee
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Apr. 30, 2015
claim
employee
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Dec. 31, 2013
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| Loss Contingencies [Line Items] |
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| Number of subsidiaries included in law suit |
2lts_NumberofSubsidiariesIncludedinLawSuit
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| Accrued liabilities |
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$ 223us-gaap_LossContingencyAccrualProductLiabilityNet
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| Charges to operations |
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223us-gaap_LossContingencyLossInPeriod
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| Convertible Notes Payable [Member] |
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| Loss Contingencies [Line Items] |
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| Proceeds from issuance Public Offering |
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300,000lts_ProceedsfromIssuancePublicOffering
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
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| Common Stock |
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| Loss Contingencies [Line Items] |
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| Proceeds from issuance Public Offering |
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1,656,000lts_ProceedsfromIssuancePublicOffering
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
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| Compensatory damages |
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| Loss Contingencies [Line Items] |
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| Loss contingency accrual |
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1,325us-gaap_LossContingencyAccrualAtCarryingValue
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= lts_CompensatoryMember
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| New claims filed, number |
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2us-gaap_LossContingencyNewClaimsFiledNumber
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= lts_CompensatoryMember
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| Number of plaintiffs |
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17us-gaap_LossContingencyNumberOfPlaintiffs
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= lts_CompensatoryMember
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| Compensatory damages | Triad |
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| Loss Contingencies [Line Items] |
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| New claims filed, number |
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7us-gaap_LossContingencyNewClaimsFiledNumber
/ dei_LegalEntityAxis
= lts_TriadAdvisorsIncMember
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= lts_CompensatoryMember
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| Compensatory damages | Triad | Subsequent Event |
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| Loss Contingencies [Line Items] |
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| New claims filed, number |
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3us-gaap_LossContingencyNewClaimsFiledNumber
/ dei_LegalEntityAxis
= lts_TriadAdvisorsIncMember
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= lts_CompensatoryMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
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| Number of plaintiffs |
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32,000us-gaap_LossContingencyNumberOfPlaintiffs
/ dei_LegalEntityAxis
= lts_TriadAdvisorsIncMember
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= lts_CompensatoryMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
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| Damages sought by plaintiff |
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5,100us-gaap_LossContingencyDamagesSoughtValue
/ dei_LegalEntityAxis
= lts_TriadAdvisorsIncMember
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= lts_CompensatoryMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
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| Compensatory damages | Securities America |
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| Loss Contingencies [Line Items] |
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| Number of plaintiffs |
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29us-gaap_LossContingencyNumberOfPlaintiffs
/ dei_LegalEntityAxis
= lts_SecuritiesAmericaFinancialCorporationMember
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= lts_CompensatoryMember
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| Damages sought by plaintiff |
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$ 5,000us-gaap_LossContingencyDamagesSoughtValue
/ dei_LegalEntityAxis
= lts_SecuritiesAmericaFinancialCorporationMember
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= lts_CompensatoryMember
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| Compensatory damages | Securities America | Pending Litigation [Member] |
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| Loss Contingencies [Line Items] |
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| Number of plaintiffs |
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19us-gaap_LossContingencyNumberOfPlaintiffs
/ dei_LegalEntityAxis
= lts_SecuritiesAmericaFinancialCorporationMember
/ us-gaap_LitigationStatusAxis
= us-gaap_PendingLitigationMember
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= lts_CompensatoryMember
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| Compensatory damages | Securities America | Subsequent Event |
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| Loss Contingencies [Line Items] |
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| New claims filed, number |
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9us-gaap_LossContingencyNewClaimsFiledNumber
/ dei_LegalEntityAxis
= lts_SecuritiesAmericaFinancialCorporationMember
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= lts_CompensatoryMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
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| Number of plaintiffs |
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48us-gaap_LossContingencyNumberOfPlaintiffs
/ dei_LegalEntityAxis
= lts_SecuritiesAmericaFinancialCorporationMember
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= lts_CompensatoryMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
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| Compensatory damages | Ladenburg |
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| Loss Contingencies [Line Items] |
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| Number of plaintiffs |
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1us-gaap_LossContingencyNumberOfPlaintiffs
/ dei_LegalEntityAxis
= lts_LadenburgThalmannAndCoIncMember
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= lts_CompensatoryMember
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