Note 4 - Income Per Share - Percentage of Net Earnings Allocable to Common Shareholders (Details) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Weighted average participating common shares (in shares)	31,947,753	31,888,753	32,124,260	31,886,549
Weighted average participating common shares (in shares)	31,947,753	31,888,753	32,124,260	31,886,549
Add: Weighted average shares of Convertible Preferred Stock (in shares)	255,000	255,000	255,000	255,000
Weighted average participating shares (in shares)	32,202,753	32,143,753	32,379,260	32,141,549
Portion allocable to common shareholders	99.20%	99.20%	99.20%	99.20%