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Note 6 - Capital Lease Obligations - Capital Lease Obligations (Details) (Parentheticals) - USD ($) | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Annual principal payments | $ 72,686 | $ 72,686
Interest rate | 1.80% | 1.80%

X
- Definition The interest rate applicable to the portion of the carrying amount of capital lease obligations as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate. + References No definition available. + Details
Name: | tlf_CapitalLeaseObligationsPercentageBearingFixedInterestRate
Namespace Prefix: | tlf_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of total annual principal lease payments for capital leases. + References No definition available. + Details
Name: | tlf_CapitalLeasesTotalAnnualPrincipalPayments
Namespace Prefix: | tlf_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant