Note 1 - Basis of Presentation and Certain Significant Accounting Policies - Disaggregated Revenue (Details)	3 Months Ended	9 Months Ended
Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenue, Percent	100.00%	100.00%	100.00%	100.00%
Retail [Member]
Revenue, Percent	59.00%	57.00%	60.00%	57.00%
Non-Retail [Member]
Revenue, Percent	41.00%	43.00%	40.00%	43.00%

Amount, expressed as a percent, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

No definition available.

Name:	tlf_RevenueFromContractWithCustomerIncludingAssessedTaxPercent
Namespace Prefix:	tlf_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration