Note 5 - Segment Reporting (Details)	3 Months Ended		12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Note 5 - Segment Reporting (Details) [Line Items]
Number of Operating Segments	1
Geographic Concentration Risk [Member] | UNITED STATES | Sales Revenue, Net [Member]
Note 5 - Segment Reporting (Details) [Line Items]
Concentration Risk, Percentage	86.00%	85.00%
Geographic Concentration Risk [Member] | UNITED STATES | Net Assets, Geographic Area [Member]
Note 5 - Segment Reporting (Details) [Line Items]
Concentration Risk, Percentage	91.00%		90.00%