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Note 5 - (Loss) Earnings Per Common Share (Details Textual) - $ / shares	3 Months Ended		6 Months Ended		15 Months Ended	18 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
Common Stock, Shares Authorized	750,000,000		750,000,000		750,000,000	750,000,000	750,000,000
Common Stock, Par or Stated Value Per Share	$ 0.25		$ 0.25		$ 0.25	$ 0.25	$ 0.25
Common Stock, Shares, Issued, Total	488,870,345		488,870,345		488,870,345	488,870,345	482,603,937
Treasury Stock, Shares, Ending Balance	5,941,436		5,941,436		5,941,436	5,941,436	5,226,791
Common Stock, Shares, Outstanding, Ending Balance	488,870,345		488,870,345		488,870,345	488,870,345	482,603,937
Earnings Per Share, Basic and Diluted, Total	$ 0.10	$ 0.03	$ 0.15	$ 0.05
Class of Warrant or Right, Outstanding		0		0
Restricted Stock Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		2,218,281		2,307,796
Deferred Shares [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		106,185
Restricted Stock Units (RSUs) [Member]
Incremental Common Shares Attributable to Share-based Payment Arrangements, Total					1,268,601	1,179,086
Deferred Shares [Member]
Incremental Common Shares Attributable to Share-based Payment Arrangements, Total		1,721,932