Note 4 - Segment Reporting (Details)	6 Months Ended	3 Months Ended		6 Months Ended			12 Months Ended
	Jun. 30, 2014	Jun. 30, 2014 Sales Revenue, Net [Member] Geographic Concentration Risk [Member] UNITED STATES	Jun. 30, 2013 Sales Revenue, Net [Member] Geographic Concentration Risk [Member] UNITED STATES	Jun. 30, 2014 Sales Revenue, Net [Member] Geographic Concentration Risk [Member] UNITED STATES	Jun. 30, 2013 Sales Revenue, Net [Member] Geographic Concentration Risk [Member] UNITED STATES	Jun. 30, 2014 Net Assets, Geographic Area [Member] Geographic Concentration Risk [Member] UNITED STATES	Dec. 31, 2013 Net Assets, Geographic Area [Member] Geographic Concentration Risk [Member] UNITED STATES
Note 4 - Segment Reporting (Details) [Line Items]
Number of Operating Segments	1
Concentration Risk, Percentage		85.00%	90.00%	85.00%	90.00%	90.00%	90.00%