Note 10 - Shareholders' Equity (Details) - Stock Option Activity (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Note 10 - Shareholders' Equity (Details) - Stock Option Activity [Line Items]
Options, Shares	1,070,000	1,790,002
Options, Weighted Average Exercise Price Per Option	$ 1.58	$ 1.49
Options exercisable, December 31, 2014	480,000
Options exercisable, December 31, 2014	$ 1.60
Granted to employees and non-employee directors, Shares	0	120,000
Exercised, Shares	(490,000)	(765,002)
Exercised, Weighted Average Exercise Price Per Option	$ 1.58	$ 1.38
Canceled/expired/forfeited, Shares		(75,000)
Canceled/expired/forfeited, Weighted Average Exercise Price Per Option		$ 1.48
Options, Shares	580,000	1,070,000
Options, Weighted Average Exercise Price Per Option	$ 1.58	$ 1.58
Employees and Non-employee Directors [Member]
Note 10 - Shareholders' Equity (Details) - Stock Option Activity [Line Items]
Granted to employees and non-employee directors, Shares		120,000
Granted to employees and non-employee directors, Weighted Average Exercise Price Per Option		$ 1.51