Note 12 - Income Taxes (Details) - Deferred Tax Assets (USD $)	Dec. 31, 2013	Dec. 31, 2012
Deferred Tax Assets [Abstract]
Net operating loss	$ 48,280,000	$ 50,515,000
Property and equipment	(1,525,000)	(2,447,000)
Stock options and warrants	9,738,000	7,960,000
Other	1,151,000	1,269,000
Total deferred tax assets	57,644,000	57,297,000
Valuation allowance	$ (57,644,000)	$ (57,297,000)