Note 3 - Investments (Details) - Investment in Common Stock Warrants (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Class of Warrant or Right [Line Items]
Beginning balance	$ 1,606,000
Fair value change in common stock warrants	(30,000)	(350,000)
Ending balance	2,840,000	1,606,000
Warrant [Member]
Class of Warrant or Right [Line Items]
Beginning balance	350,000
Fair value change in common stock warrants	30,000	350,000
Fair value of warrants exercised	(380,000)
Ending balance		$ 350,000