Note 8 - Office Properties and Equipment (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Depreciation	$ 3,706,000	$ 3,293,000	$ 2,171,000
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment	5,300,000
Impairment of Long-Lived Assets to be Disposed of	1,076,000	0	0
Gain (Loss) on Disposition of Property Plant Equipment	1,019,000	85,000	24,000
Operating Leases, Future Minimum Payments Due to Oustanding Loan Holders (Lessors)	8,800,000
Operating Leases, Rent Expense	$ 874,000	721,000	484,000
Lessor Leasing Arrangements, Operating Leases, Renewal Term	5 years
Rental Income, Nonoperating	$ 441,000	$ 435,000	$ 285,000
Minimum [Member]
Lessee Leasing Arrangements, Operating Leases, Renewal Term	1 year
Maximum [Member]
Lessee Leasing Arrangements, Operating Leases, Renewal Term	20 years
Office Properties [Member]
Gain (Loss) on Disposition of Property Plant Equipment	$ 1,000,000