Note 10 - Stockholders' Equity - Unrecognized Compensation Expense for Non-vested Restricted Stock Awards (Details) - Restricted Stock [Member]	Dec. 31, 2018 USD ($)
2019	$ 714,754
2020	711,733
2021	699,088
2022	679,880
2023	$ 509,911

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

Name:	us-gaap_AwardTypeAxis=us-gaap_RestrictedStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: