Note 6. Loans (Detail) - Residential Real Estate and Installment Loan Class by Credit Quality (USD $)	Jun. 30, 2012	Dec. 31, 2011
Loans Receivable	$ 287,987,674	$ 303,399,745
Performing Financing Receivable [Member] | Residential Real Estate Loans [Member]
Loans Receivable	257,036,754	271,920,147
Performing Financing Receivable [Member] | Installment and Other Loans [Member]
Loans Receivable	12,798,307	14,315,581
Performing Financing Receivable [Member]
Loans Receivable	269,835,061	286,235,728
Nonperforming Financing Receivable [Member] | Residential Real Estate Loans [Member]
Loans Receivable	17,650,983	16,689,236
Nonperforming Financing Receivable [Member] | Installment and Other Loans [Member]
Loans Receivable	501,630	474,781
Nonperforming Financing Receivable [Member]
Loans Receivable	18,152,613	17,164,017
Residential Real Estate Loans [Member]
Loans Receivable	274,687,737	288,609,383
Installment and Other Loans [Member]
Loans Receivable	$ 13,299,937	$ 14,790,362