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Note 2 - Earnings Per Share (Details) - Shares Used in Calculation of Earnings Per Share
 3 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Shares Used in Calculation of Earnings Per Share [Abstract]                      
Weighted-average common shares outstanding                 2,206,392 2,101,490 1,872,582
Average treasury stock shares                 (189,530) (189,530) (189,530)
Weighted-average common shares and common stock equivalents used to calculate basic earnings per share 2,027,680,000 2,022,490,000 2,017,264,000 1,999,645,000 1,984,818,000 1,978,181,000 1,919,333,000 1,763,982,000 2,016,862 1,911,960 1,683,052
Additional common stock equivalents used to calculate diluted earnings per share                 7,178 4,972  
Weighted-average common shares and common stock equivalents used to calculate diluted earnings per share 2,032,611,000 2,029,420,000 2,023,961,000 2,010,292,000 1,991,354,000 1,983,863,000 1,921,205,000 1,764,585,000 2,024,040 1,916,932 1,683,052