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5. Loans, Allowance for Loan Losses and Credit Quality (Details) (USD $)
Mar. 31, 2013
Dec. 31, 2012
Mar. 31, 2012
Dec. 31, 2011
Notes to Financial Statements        
Commercial and Industrial $ 51,044,490 $ 49,283,948 $ 46,455,835  
Commercial real estate 138,784,472 139,807,517 130,920,418  
Residential real estate - 1st lien 173,379,244 171,114,515 164,105,983  
Residential real estate - Jr. lien 45,912,846 47,029,023 45,346,141  
Consumer 9,696,044 10,642,151 11,000,989  
Gross Loans 418,817,096 417,877,154 397,829,366  
Allowance for loan losses 4,493,384 4,312,080 3,952,489 3,886,502
Deferred net loan costs (fees) (206,969) (169,501) (54,355)  
Loans held-for-sale 1,347,961 1,501,706 1,583,520  
Total Adjustments 5,634,376 5,644,285 5,481,654  
Net loans $ 413,182,720 $ 412,232,869 $ 392,347,712