Note 14 - Segment Information (Detail) - Net sales for geographic areas were as follows: (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Geographic locations	$ 72,720,624	$ 66,102,947	$ 59,892,870
United States [Member]
Geographic locations	61,041,650	56,337,737	51,561,070
Canada [Member]
Geographic locations	7,496,840	6,714,100	5,862,857
All Other Countries [Member]
Geographic locations	4,182,134	3,051,110	2,468,943
Total [Member]
Geographic locations	$ 72,720,624	$ 66,102,947	$ 59,892,870