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COMMITMENTS AND CONTINGENCIES (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Objector
Dec. 31, 2013
Commitments for minimum lease rental under operating lease [Abstract]    
2015 $ 211us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent  
2016 and after 0four_OperatingLeasesFutureMinimumPaymentsDueInTwoYearsAndThereafter  
Total 211us-gaap_OperatingLeasesFutureMinimumPaymentsDue  
Sublease expiration date Oct. 31, 2015  
Operating lease rent expense 266us-gaap_OperatingLeasesRentExpenseNet 242us-gaap_OperatingLeasesRentExpenseNet
Employment Contracts [Abstract]    
Liability for employees under contract terminated without good cause 150four_EmployeeLiabilityDueToTerminationWithoutNotice  
Percentage of voting interest supported for bankruptcy plan (in hundredths) 99.93%four_PercentageOfVotingInterestSupportedForBankruptcyPlan  
Number of objectors for bankruptcy plan 1four_NumberOfObjectorsForBankruptcyPlan  
Lehman Brothers, Inc. Claim [Member]    
Gain Contingencies [Line Items]    
Principal amount of claim 31,500us-gaap_GainContingencyUnrecordedAmount
/ us-gaap_GainContingenciesByNatureAxis
= us-gaap_PositiveOutcomeOfLitigationMember
 
Payment in connection with general release of claims 489us-gaap_FormerGainContingencyRecognizedInCurrentPeriod
/ us-gaap_GainContingenciesByNatureAxis
= us-gaap_PositiveOutcomeOfLitigationMember
 
Unsecured claim amount 3,653four_UnsecuredClaimAmount
/ us-gaap_GainContingenciesByNatureAxis
= us-gaap_PositiveOutcomeOfLitigationMember
 
Unsecured claim amount to third party 1,607four_UnsecuredClaimAmountToThirdParty
/ us-gaap_GainContingenciesByNatureAxis
= us-gaap_PositiveOutcomeOfLitigationMember
 
Cornerstone Patent Technologies, LLC [Member]    
Employment Contracts [Abstract]    
Debtors in Bankruptcy Cases, proof of claim file 3,300four_DebtorsInBankruptcyCasesProofOfClaimFile
/ dei_LegalEntityAxis
= four_CornerstonePatentTechnologiesLlcMember
 
Estimated proof of claim file, Debtors in Bankruptcy claim 0four_DebtorsInBankruptcyCasesProofOfClaimFileEstimate
/ dei_LegalEntityAxis
= four_CornerstonePatentTechnologiesLlcMember
 
Bankruptcy disputed claim reserve 228four_BankruptcyDisputedClaimReserveOrder
/ dei_LegalEntityAxis
= four_CornerstonePatentTechnologiesLlcMember
 
Recognized gain from reversal of liability 443four_RecognizedGainFromReversalOfLiability
/ dei_LegalEntityAxis
= four_CornerstonePatentTechnologiesLlcMember
 
Home Focus Interest Purchase Agreement [Member]    
Employment Contracts [Abstract]    
Damages sought in the litigation 1,075us-gaap_LossContingencyDamagesSoughtValue
/ us-gaap_LitigationCaseAxis
= four_HomeFocusMember
 
Home Focus Interest Purchase Agreement [Member] | TCD International, Ltd. [Member]    
Employment Contracts [Abstract]    
Percentage of ownership interest (in hundredths) 25.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
/ us-gaap_LitigationCaseAxis
= four_HomeFocusMember
 
Initial capital contribution 250four_InitialCapitalContribution
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
/ us-gaap_LitigationCaseAxis
= four_HomeFocusMember
 
Percentage of share of expenses to be contributed (in hundredths) 50.00%four_PercentageOfShareOfExpensesToBeContributed
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
/ us-gaap_LitigationCaseAxis
= four_HomeFocusMember
 
Settlement agreement consideration $ 750us-gaap_LitigationSettlementAmount
/ dei_LegalEntityAxis
= us-gaap_AffiliatedEntityMember
/ us-gaap_LitigationCaseAxis
= four_HomeFocusMember