Note 8 - Income Taxes (Detail) - Income before income taxes is earned in the following tax jurisdictions: (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
United States [Member]
United States	$ 7,941,689	$ 6,344,634	$ 5,670,352
United Kingdom [Member]
Income before income taxes is earned in the following tax jurisdictions	509,426	476,414	319,290
Canada [Member]
Income before income taxes is earned in the following tax jurisdictions	999,609	945,041	486,981
Australia [Member]
Income before income taxes is earned in the following tax jurisdictions	(210,372)	(131,467)
Spain [Member]
Income before income taxes is earned in the following tax jurisdictions	(294,707)	(93,120)
Total [Member]
Income before income taxes is earned in the following tax jurisdictions	$ 8,945,645	$ 7,541,502	$ 6,476,623