Note 2 - Significant Accounting Policies - Disaggregated Revenue (Details)	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenue, Percent	100.00%	100.00%	100.00%
Retail Sales [Member]
Revenue, Percent	61.00%	59.00%	56.00%
Non-Retail [Member]
Revenue, Percent	39.00%	41.00%	44.00%

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.

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