Note 9 - Fair Value of Financial Instruments (Detail) - Estimated Fair Values of Financial Instruments (USD $)	Mar. 31, 2013	Dec. 31, 2012
Cash and cash equivalents	$ 67,421,000	$ 42,607,000
Interest-bearing time deposits in banks	29,094,000	29,592,000
Federal Home Loan Bank stock	375,000	375,000
Loans held for sale	4,815,000	4,435,000
Accrued interest receivable	1,544,000	1,501,000
Loans receivable—net	333,746,000	337,328,000
Deposits held for sale	21,758,000
Other borrowings	3,053,000	3,109,000
Advance payments by borrowers for taxes and insurance	762,000	676,000
Fair Value, Inputs, Level 1 [Member]
Cash and cash equivalents	67,421,000	42,607,000
Cash and cash equivalents	67,421,000	42,607,000
Deposits held for sale	21,758,000
Deposits held for sale	21,758,000
Fair Value, Inputs, Level 2 [Member]
Interest-bearing time deposits in banks	29,094,000	29,592,000
Interest-bearing time deposits in banks	29,844,000	30,413,000
Federal Home Loan Bank stock	375,000	375,000
Federal Home Loan Bank stock	375,000	375,000
Loans held for sale	4,815,000	4,435,000
Loans held for sale	4,815,000	4,435,000
Cash surrender value of life insurance	23,201,000	23,003,000
Cash surrender value of life insurance	23,201,000	23,003,000
Accrued interest receivable	1,544,000	1,501,000
Accrued interest receivable	1,544,000	1,501,000
Checking, money market and savings accounts	207,416,000	203,308,000
Other borrowings	3,053,000	3,109,000
Other borrowings	3,172,000	3,239,000
Accrued interest payable	28,000	23,000
Accrued interest payable	28,000	23,000
Advance payments by borrowers for taxes and insurance	762,000	676,000
Advance payments by borrowers for taxes and insurance	762,000	676,000
Fair Value, Inputs, Level 3 [Member]
Loans receivable—net	333,746,000	337,328,000
Loans receivable—net	344,408,000	351,642,000
Certificates of deposit	241,185,000	251,743,000
Certificates of deposit	$ 245,906,000	$ 255,573,000