Note 5 - Income (Loss) Per Common Share (Details Textual) - $ / shares	3 Months Ended	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2016	Dec. 31, 2015
Common Stock [Member]
Shares, Issued	388,800,542	388,800,542
Common Stock, Shares Authorized	500,000,000	500,000,000	500,000,000
Common Stock, Par or Stated Value Per Share	$ 0.25	$ 0.25	$ 0.25
Treasury Stock, Shares	3,733,742	3,733,742	2,435,518
Common Stock, Shares, Outstanding	385,066,800	385,066,800	378,112,840
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	3,515,356	3,515,356