Note 8 - Deposits - Interest Expense on Deposits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Certificate of deposit accounts	$ 20,536	$ 20,943	$ 22,420
Savings accounts	1,219	1,151	597
Money market accounts	3,592	1,551	667
NOW accounts	7,891	6,593	6,227
Total due to depositors	33,238	30,238	29,911
Mortgagors' escrow deposits	112	98	133
Total interest expense on deposits	$ 33,350	$ 30,336	$ 30,044