Note 13 - Segment Information (Details) - Net Sales for Geographic Areas (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenues from External Customers and Long-Lived Assets [Line Items]
Geographic locations	$ 78,284,585	$ 72,720,624	$ 66,102,947
UNITED STATES
Revenues from External Customers and Long-Lived Assets [Line Items]
Geographic locations	65,371,652	61,041,650	56,337,737
CANADA
Revenues from External Customers and Long-Lived Assets [Line Items]
Geographic locations	8,004,320	7,496,840	6,714,100
All Other Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Geographic locations	$ 4,908,613	$ 4,182,134	$ 3,051,110