Note 4 - Stock-based Compensation - Unrecognized Compensation Expense for Nonvested Restricted Stock Awards (Details)	Mar. 31, 2019 USD ($)
2019	$ 575,815
2020	764,732
2021	752,087
2022	688,713
2023	$ 509,911

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

No definition available.

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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