Note 13 - Income (Loss) Per Common Share (Details Textual) - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2014	Dec. 31, 2015
Common Stock, Shares Authorized	500,000,000		500,000,000
Common Stock, Par or Stated Value Per Share	$ 0.25		$ 0.25
Common Stock, Shares, Issued	395,286,875		378,112,840
Treasury Stock, Shares	3,941,210		2,764,973
Common Stock, Shares, Outstanding	395,286,875		378,112,840
Preferred Stock, Shares Outstanding	157,816	157,816	157,816
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	0		0
Restricted Stock Units (RSUs) [Member]
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	4,309,440	4,670,170
Employee Stock Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		259,342
Gross of Treasury Stock [Member]
Common Stock, Shares, Issued	399,228,085