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Note 2 - Earnings Per Share (Detail) - Shares Used in Calculation of Earnings Per Share
3 Months Ended 12 Months Ended
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Weighted average common shares outstanding                 2,101,490 1,872,582 1,764,743
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 1,984,818 1,978,181 1,919,333 1,763,982 1,756,157 1,704,677 1,647,771 1,621,889 1,911,960 1,683,052 1,575,213
Additional common stock equivalents used to calculate diluted earnings per share                 4,972   608
Weighted average common shares and common stock equivalents used to calculate diluted earnings per share 1,991,354 1,983,863 1,921,205 1,764,585 1,756,157 1,704,677 1,647,920 1,651,889 1,916,932 1,683,052 1,575,821