Note 9 - Reverse Stock Split (Details Textual)		1 Months Ended
	Jul. 23, 2015 $ / shares shares	Aug. 06, 2015 shares	Jun. 30, 2015 $ / shares shares	Dec. 31, 2014 $ / shares shares
Subsequent Event [Member] | Reverse Stock Split [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio	15
Subsequent Event [Member]
Common Stock, Shares, Issued		12,347,591
Stock Issued During Period, Shares, New Issues		0
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, Outstanding		12,347,591
Difference in Shares Issued from Reserve Stock Split		1,117
Prior to Reverse Stock Split [Member]
Common Stock, Shares, Issued			185,197,097
Common Stock, Shares, Outstanding			180,201,953
Treasury Stock, Shares			4,995,144
Common Stock, Shares, Issued			12,346,474	12,278,439
Common Stock, Shares Authorized			200,000,000	200,000,000
Common Stock, Par or Stated Value Per Share | $ / shares			$ 0.001	$ 0.001
Common Stock, Shares, Outstanding			12,013,464	11,945,430
Treasury Stock, Shares			333,010	333,010