Note 9 - Stockholders' Equity (Details Textual) - $ / shares	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014	Nov. 20, 2012
Preferred Stock, Shares Outstanding		0	0
Common Stock, Shares, Issued	96,766,329		95,054,552
Preferred Stock, Shares Authorized	10,000,000
Preferred Stock, Par or Stated Value Per Share	$ 0.001
Common Stock, Shares Authorized		200,000,000		120,000,000
Common Stock, Par or Stated Value Per Share	$ 0.001
Common Stock, Shares, Outstanding	96,766,329		95,054,552