Credit Risk Grades within Loan Portfolio (Detail) (USD $)	Sep. 30, 2012	Dec. 31, 2011
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	$ 57,634,447	$ 52,639,397
Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	2,189,638	4,437,718
Commercial and Industrial \| Prime
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	537,504	425,000
Commercial and Industrial \| Good
Financing Receivable, Recorded Investment [Line Items]
Loans receivable		2,000,000
Commercial and Industrial \| Acceptable
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	176,301	245,490
Commercial and Industrial \| Acceptable with Care
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	1,293,986	1,567,228
Commercial and Industrial \| Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	8,942
Commercial and Industrial \| Substandard assets
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	172,905	200,000
Commercial Real Estate Construction
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	6,726,129	3,329,502
Commercial Real Estate Construction \| Acceptable
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	1,988,208	1,978,000
Commercial Real Estate Construction \| Acceptable with Care
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	4,732,554	1,231,118
Commercial Real Estate Construction \| Substandard assets
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	5,367	120,384
Commercial Real Estate Other Receivable
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	25,680,592	21,783,860
Commercial Real Estate Other Receivable \| Acceptable
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	6,204,268	6,954,362
Commercial Real Estate Other Receivable \| Acceptable with Care
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	16,645,788	10,959,444
Commercial Real Estate Other Receivable \| Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	395,810	1,001,180
Commercial Real Estate Other Receivable \| Substandard assets
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	2,434,726	2,868,874
Residential - Prime, Residential Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	18,279,690	19,628,339
Residential - Prime, Residential Mortgage \| Good
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	155,710	174,479
Residential - Prime, Residential Mortgage \| Acceptable
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	13,991,388	14,745,996
Residential - Prime, Residential Mortgage \| Acceptable with Care
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	3,508,770	3,959,623
Residential - Prime, Residential Mortgage \| Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	569,460	582,124
Residential - Prime, Residential Mortgage \| Substandard assets
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	54,362	166,117
Residential - Prime, Residential Construction
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	1,635,000	1,545,689
Residential - Prime, Residential Construction \| Acceptable
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	1,635,000	1,545,689
Consumer - Auto
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	45,405	62,382
Consumer - Auto \| Good
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	11,410	20,795
Consumer - Auto \| Acceptable
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	21,639	27,013
Consumer - Auto \| Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	12,356	14,574
Consumer - Other
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	3,077,993	1,851,907
Consumer - Other \| Prime
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	214,691	224,075
Consumer - Other \| Acceptable
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	2,862,070	1,599,254
Consumer - Other \| Acceptable with Care
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	832	6,791
Consumer - Other \| Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	400
Consumer - Other \| Substandard assets
Financing Receivable, Recorded Investment [Line Items]
Loans receivable		$ 21,787

Coastal Carolina Bancshares, Inc. 10-Q