Note 4 - Loans and Allowance for Loan Losses (Detail) - Loan Portfolio by Credit Quality (USD $)	Mar. 31, 2013	Dec. 31, 2012
Rating:
Loan Balance by Credit Quality	$ 460,123,960	$ 474,408,734
Real Estate Construction [Member] | Pass [Member]
Rating:
Loan Balance by Credit Quality	38,967,000	35,775,000
Real Estate Construction [Member] | Special Mention [Member]
Rating:
Loan Balance by Credit Quality	6,962,000	6,868,000
Real Estate Construction [Member] | Substandard [Member]
Rating:
Loan Balance by Credit Quality	5,666,000	5,581,000
Real Estate Construction [Member] | Doubtful [Member]
Rating:
Loan Balance by Credit Quality	269,000	693,000
Real Estate Construction [Member] | Total [Member]
Rating:
Loan Balance by Credit Quality	51,864,000	48,917,000
Real Estate Construction [Member]
Rating:
Loan Balance by Credit Quality	51,863,948	48,917,296
Real Estate Commercial [Member] | Pass [Member]
Rating:
Loan Balance by Credit Quality	144,482,000	156,448,000
Real Estate Commercial [Member] | Special Mention [Member]
Rating:
Loan Balance by Credit Quality	4,302,000	4,976,000
Real Estate Commercial [Member] | Substandard [Member]
Rating:
Loan Balance by Credit Quality	5,949,000	6,337,000
Real Estate Commercial [Member] | Total [Member]
Rating:
Loan Balance by Credit Quality	154,733,000	167,761,000
Real Estate Commercial [Member]
Rating:
Loan Balance by Credit Quality	154,733,461	167,760,850
One to Four Family Units [Member] | Pass [Member]
Rating:
Loan Balance by Credit Quality	93,332,000	94,209,000
One to Four Family Units [Member] | Special Mention [Member]
Rating:
Loan Balance by Credit Quality	1,328,000	1,636,000
One to Four Family Units [Member] | Substandard [Member]
Rating:
Loan Balance by Credit Quality	3,065,000	3,507,000
One to Four Family Units [Member] | Doubtful [Member]
Rating:
Loan Balance by Credit Quality	29,000	30,000
One to Four Family Units [Member] | Total [Member]
Rating:
Loan Balance by Credit Quality	97,754,000	99,382,000
One to Four Family Units [Member]
Rating:
Loan Balance by Credit Quality	97,753,551	99,381,934
Multi-Family Units [Member] | Pass [Member]
Rating:
Loan Balance by Credit Quality	45,240,000	45,133,000
Multi-Family Units [Member] | Special Mention [Member]
Rating:
Loan Balance by Credit Quality	1,265,000	1,272,000
Multi-Family Units [Member] | Total [Member]
Rating:
Loan Balance by Credit Quality	46,505,000	46,405,000
Multi-Family Units [Member]
Rating:
Loan Balance by Credit Quality	46,505,351	46,405,034
Commercial Loans [Member] | Pass [Member]
Rating:
Loan Balance by Credit Quality	85,241,000	88,230,000
Commercial Loans [Member] | Special Mention [Member]
Rating:
Loan Balance by Credit Quality	625,000	2,255,000
Commercial Loans [Member] | Substandard [Member]
Rating:
Loan Balance by Credit Quality	5,405,000	4,742,000
Commercial Loans [Member] | Total [Member]
Rating:
Loan Balance by Credit Quality	91,271,000	95,227,000
Commercial Loans [Member]
Rating:
Loan Balance by Credit Quality	91,270,559	95,226,762
Consumer and Other Loans [Member] | Pass [Member]
Rating:
Loan Balance by Credit Quality	17,038,000	15,840,000
Consumer and Other Loans [Member] | Special Mention [Member]
Rating:
Loan Balance by Credit Quality	104,000	93,000
Consumer and Other Loans [Member] | Substandard [Member]
Rating:
Loan Balance by Credit Quality	855,000	784,000
Consumer and Other Loans [Member] | Total [Member]
Rating:
Loan Balance by Credit Quality	17,997,000	16,717,000
Consumer and Other Loans [Member]
Rating:
Loan Balance by Credit Quality	17,997,090	16,716,858
Pass [Member]
Rating:
Loan Balance by Credit Quality	424,300,000	435,635,000
Special Mention [Member]
Rating:
Loan Balance by Credit Quality	14,586,000	17,100,000
Substandard [Member]
Rating:
Loan Balance by Credit Quality	20,940,000	20,951,000
Doubtful [Member]
Rating:
Loan Balance by Credit Quality	298,000	723,000
Total [Member]
Rating:
Loan Balance by Credit Quality	$ 460,124,000	$ 474,409,000