Note 7 - Segment Information - Summary of Reportable Operating Segments (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Net sales	$ 20,288,918	$ 20,149,845
Gross profit	12,842,962	12,286,045
Operating income (loss)	1,768,961	1,737,491
Interest expense	64,642	36,344
Other (income) expense, net	(38,872)	(2,651)
Income (loss) before income taxes	1,743,191	1,703,798
Depreciation and amortization	465,522	458,118
Fixed asset additions	240,020	599,757
Total assets	75,047,987	71,268,774	$ 74,914,596
North America Segment [Member]
Net sales	19,317,260	19,231,714
Gross profit	12,226,002	11,752,957
Operating income (loss)	1,830,659	1,811,563
Interest expense	64,642	36,344
Other (income) expense, net	(35,184)	(17,654)
Income (loss) before income taxes	1,801,201	1,792,873
Depreciation and amortization	441,552	436,281
Fixed asset additions	237,658	597,826
Total assets	70,292,225	67,016,728
International Leathercraft [Member]
Net sales	971,658	918,131
Gross profit	616,960	533,088
Operating income (loss)	(61,698)	(74,072)
Interest expense
Other (income) expense, net	(3,688)	15,003
Income (loss) before income taxes	(58,010)	(89,075)
Depreciation and amortization	23,970	21,837
Fixed asset additions	2,362	1,931
Total assets	$ 4,755,762	$ 4,252,046