Note 8 - Subsequent Events (Details Textual)	Jul. 23, 2015 $ / shares shares	Jul. 02, 2015	Jun. 30, 2015 $ / shares shares	Dec. 31, 2014 $ / shares shares
Subsequent Event [Member] | Equity Incentive Plan 2025 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	5,000,000
Subsequent Event [Member] | Reverse Stock Split [Member] | Minimum [Member]
Stockholders' Equity Note, Stock Split, Approved Conversion Ratio		12
Subsequent Event [Member] | Reverse Stock Split [Member] | Maximum [Member]
Stockholders' Equity Note, Stock Split, Approved Conversion Ratio		15
Subsequent Event [Member] | Reverse Stock Split [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio	15
Subsequent Event [Member]
Common Stock, Shares Authorized	200,000,000
Common Stock, Par or Stated Value Per Share | $ / shares	$ 0.001
Preferred Stock, Shares Authorized	10,000,000
Preferred Stock, Par or Stated Value Per Share | $ / shares	$ 0.01
Common Stock, Shares Authorized			200,000,000	200,000,000
Common Stock, Par or Stated Value Per Share | $ / shares			$ 0.001	$ 0.001