Note 6. Loans (Detail) - Loans Individually Evaluated for Impairment by Class (USD $)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Loans with no related allowance recorded:
Partial Charge-offs	$ (1,850,714)	$ (1,968,395)	$ (2,835,160)	$ (3,051,523)	$ (7,127,898)
Recorded Investment	29,044,984		29,044,984		24,144,704
Loans with a related allowance recorded:
Partial Charge-offs	(1,850,714)	(1,968,395)	(2,835,160)	(3,051,523)	(7,127,898)
Allowance For Loan Losses Allocation	6,916,587		6,916,587		6,466,579
Recorded Investment	23,776,630		23,776,630		24,368,902
Partial Charge-offs	(1,850,714)	(1,968,395)	(2,835,160)	(3,051,523)	(7,127,898)
Allowance For Loan Losses Allocation	6,916,587		6,916,587		6,466,579
Recorded Investment	52,821,614		52,821,614		48,513,606
Commercial Financing Receivable [Member] | Individually Evaluated for Impairment [Member] | Loans with No Related Allowance Recorded [Member]
Loans with no related allowance recorded:
Unpaid Principal Balance	29,352		29,352		366,920
Partial Charge-offs			1,107		11,218
Recorded Investment	28,245		28,245		355,702
Loans with a related allowance recorded:
Partial Charge-offs			1,107		11,218
Partial Charge-offs			1,107		11,218
Commercial Financing Receivable [Member] | Individually Evaluated for Impairment [Member] | Loans with a Related Allowance Recorded [Member]
Loans with no related allowance recorded:
Partial Charge-offs			3,992
Loans with a related allowance recorded:
Unpaid Principal Balance	210,316		210,316		37,396
Partial Charge-offs			3,992
Allowance For Loan Losses Allocation	131,324		131,324		24,175
Recorded Investment	75,000		75,000		13,221
Partial Charge-offs			3,992
Allowance For Loan Losses Allocation	131,324		131,324		24,175
Commercial Real Estate Construction Financing Receivable [Member] | Individually Evaluated for Impairment [Member] | Loans with No Related Allowance Recorded [Member]
Loans with no related allowance recorded:
Unpaid Principal Balance	889,605		889,605		1,481,875
Partial Charge-offs					13,850
Recorded Investment	889,605		889,605		1,468,025
Loans with a related allowance recorded:
Partial Charge-offs					13,850
Partial Charge-offs					13,850
Commercial Real Estate Construction Financing Receivable [Member] | Individually Evaluated for Impairment [Member] | Loans with a Related Allowance Recorded [Member]
Loans with no related allowance recorded:
Partial Charge-offs			17,404		14,643
Loans with a related allowance recorded:
Unpaid Principal Balance	1,645,918		1,645,918		774,837
Partial Charge-offs			17,404		14,643
Allowance For Loan Losses Allocation	454,139		454,139		274,218
Recorded Investment	1,174,375		1,174,375		485,976
Partial Charge-offs			17,404		14,643
Allowance For Loan Losses Allocation	454,139		454,139		274,218
Commercial Real Estate Other Receivable [Member] | Individually Evaluated for Impairment [Member] | Loans with No Related Allowance Recorded [Member]
Loans with no related allowance recorded:
Unpaid Principal Balance	14,818,239		14,818,239		7,968,827
Partial Charge-offs			1,125,434		1,034,776
Recorded Investment	13,692,805		13,692,805		6,934,051
Loans with a related allowance recorded:
Partial Charge-offs			1,125,434		1,034,776
Partial Charge-offs			1,125,434		1,034,776
Commercial Real Estate Other Receivable [Member] | Individually Evaluated for Impairment [Member] | Loans with a Related Allowance Recorded [Member]
Loans with no related allowance recorded:
Partial Charge-offs			214,029		185,080
Loans with a related allowance recorded:
Unpaid Principal Balance	5,021,376		5,021,376		8,066,785
Partial Charge-offs			214,029		185,080
Allowance For Loan Losses Allocation	1,523,133		1,523,133		1,743,062
Recorded Investment	3,284,214		3,284,214		6,138,643
Partial Charge-offs			214,029		185,080
Allowance For Loan Losses Allocation	1,523,133		1,523,133		1,743,062
Residential Financing Receivable [Member] | Individually Evaluated for Impairment [Member] | Loans with No Related Allowance Recorded [Member]
Loans with no related allowance recorded:
Unpaid Principal Balance	14,224,207		14,224,207		14,640,519
Partial Charge-offs			115,556		82,953
Recorded Investment	14,108,651		14,108,651		14,557,566
Loans with a related allowance recorded:
Partial Charge-offs			115,556		82,953
Partial Charge-offs			115,556		82,953
Residential Financing Receivable [Member] | Individually Evaluated for Impairment [Member] | Loans with a Related Allowance Recorded [Member]
Loans with no related allowance recorded:
Partial Charge-offs			362,433		376,919
Loans with a related allowance recorded:
Unpaid Principal Balance	16,193,749		16,193,749		14,715,142
Partial Charge-offs			362,433		376,919
Allowance For Loan Losses Allocation	4,137,048		4,137,048		3,847,056
Recorded Investment	11,694,268		11,694,268		10,491,167
Partial Charge-offs			362,433		376,919
Allowance For Loan Losses Allocation	4,137,048		4,137,048		3,847,056
Multifamily Real Estate Receivable [Member] | Individually Evaluated for Impairment [Member] | Loans with No Related Allowance Recorded [Member]
Loans with no related allowance recorded:
Unpaid Principal Balance	130,880		130,880		734,274
Partial Charge-offs			8,271		5,508
Recorded Investment	122,609		122,609		728,766
Loans with a related allowance recorded:
Partial Charge-offs			8,271		5,508
Partial Charge-offs			8,271		5,508
Multifamily Real Estate Receivable [Member] | Individually Evaluated for Impairment [Member] | Loans with a Related Allowance Recorded [Member]
Loans with no related allowance recorded:
Partial Charge-offs			1,826		17,902
Loans with a related allowance recorded:
Unpaid Principal Balance	1,154,216		1,154,216		1,279,699
Partial Charge-offs			1,826		17,902
Allowance For Loan Losses Allocation	579,302		579,302		523,481
Recorded Investment	573,088		573,088		738,316
Partial Charge-offs			1,826		17,902
Allowance For Loan Losses Allocation	579,302		579,302		523,481
Consumer Other Financing Receivable [Member] | Individually Evaluated for Impairment [Member] | Loans with No Related Allowance Recorded [Member]
Loans with no related allowance recorded:
Unpaid Principal Balance	204,298		204,298		100,594
Partial Charge-offs			1,229
Recorded Investment	203,069		203,069		100,594
Loans with a related allowance recorded:
Partial Charge-offs			1,229
Partial Charge-offs			1,229
Consumer Other Financing Receivable [Member] | Individually Evaluated for Impairment [Member] | Loans with a Related Allowance Recorded [Member]
Loans with a related allowance recorded:
Unpaid Principal Balance	150,739		150,739		89,587
Allowance For Loan Losses Allocation	91,641		91,641		54,587
Recorded Investment	59,098		59,098		35,000
Allowance For Loan Losses Allocation	91,641		91,641		54,587
Individually Evaluated for Impairment [Member] | Loans with No Related Allowance Recorded [Member]
Loans with no related allowance recorded:
Unpaid Principal Balance	30,296,581		30,296,581		25,293,009
Partial Charge-offs			1,251,597		1,148,305
Recorded Investment	29,044,984		29,044,984		24,144,704
Loans with a related allowance recorded:
Partial Charge-offs			1,251,597		1,148,305
Partial Charge-offs			1,251,597		1,148,305
Individually Evaluated for Impairment [Member] | Loans with a Related Allowance Recorded [Member]
Loans with no related allowance recorded:
Partial Charge-offs			599,684		594,544
Loans with a related allowance recorded:
Unpaid Principal Balance	24,376,314		24,376,314		24,963,446
Partial Charge-offs			599,684		594,544
Allowance For Loan Losses Allocation	6,916,587		6,916,587		6,466,579
Recorded Investment	16,860,043		16,860,043		17,902,323
Partial Charge-offs			599,684		594,544
Allowance For Loan Losses Allocation	6,916,587		6,916,587		6,466,579
Individually Evaluated for Impairment [Member]
Loans with no related allowance recorded:
Partial Charge-offs			1,851,281		1,742,849
Loans with a related allowance recorded:
Partial Charge-offs			1,851,281		1,742,849
Allowance For Loan Losses Allocation	6,916,587		6,916,587		6,466,579
Unpaid Principal Balance	54,672,895		54,672,895		50,256,455
Partial Charge-offs			1,851,281		1,742,849
Allowance For Loan Losses Allocation	6,916,587		6,916,587		6,466,579
Recorded Investment	$ 45,905,027		$ 45,905,027		$ 42,047,027