Note 4 - Stock-based Compensation - Unrecognized Compensation Expense for Nonvested Restricted Stock Awards (Details)	Mar. 31, 2017 USD ($)
2017	$ 143,444
2018	141,816
2019	85,313
2020	28,144
2021	$ 3,020

Unrecognized cost of unvested share-based compensation awards due during the remainder of the fiscal year.

No definition available.

Name:	tlf_EmployeeServiceShareBasedCompensationNonvestedAwardsCompensationCostNotYetRecognizedRemainderOfFiscalYear
Namespace Prefix:	tlf_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Unrecognized cost of unvested share-based compensation awards due in three years.

No definition available.

Name:	tlf_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedDueInThreeYears
Namespace Prefix:	tlf_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Unrecognized cost of unvested share-based compensation awards due in five years.

No definition available.

Name:	tlf_EmployeeServiceSharebasedCompensationNonvestedAwardsCompensationCostNotYetRecognizedDueInFiveYears
Namespace Prefix:	tlf_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Unrecognized cost of unvested share-based compensation awards.

No definition available.

Name:	tlf_EmployeeServiceSharebasedCompensationNonvestedAwardsCompensationCostNotYetRecognizedDueInFourYears
Namespace Prefix:	tlf_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Unrecognized cost of unvested share-based compensation awards due in two years.

No definition available.

Name:	tlf_EmployeeServiceSharebasedCompensationNonvestedAwardsCompensationCostNotYetRecognizedDueInTwoYears
Namespace Prefix:	tlf_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant