Note 6 - Loans Held for Sale - Delinquent and Non-performing Loans Sold During the Period Indicated (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)
Performing Financial Instruments [Member]
Loans sold	3	9	3	9
Proceeds	$ 2,069,000	$ 5,671,000	$ 2,069,000	$ 5,671,000
Net gain (loss)	$ 114,000	$ 393,000	114,000	$ 393,000
Net (charge-offs) recoveries			$ 0
Performing Financial Instruments [Member] | Small Business Administration Portfolio Segment [Member]
Loans sold	3	9	3
Proceeds	$ 2,069,000	$ 5,671,000	$ 2,069,000
Net gain (loss)	$ 114,000	$ 393,000	114,000
Net (charge-offs) recoveries			$ 0
Nonperforming Financial Instruments [Member]
Loans sold		2	3	6
Proceeds		$ 2,065,000	$ 1,170,000	$ 4,529,000
Net gain (loss)		$ 28,000	63,000	$ (235,000)
Net (charge-offs) recoveries			$ (1,000)
Nonperforming Financial Instruments [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans sold		2		3
Proceeds		$ 2,065,000		$ 3,565,000
Net gain (loss)		$ 28,000		$ (235,000)
Nonperforming Financial Instruments [Member] | Multi-family Residential Portfolio Segment [Member]
Loans sold			2	3
Proceeds			$ 765,000	$ 964,000
Net gain (loss)			63,000	$ 0
Net (charge-offs) recoveries			$ 0
Nonperforming Financial Instruments [Member] | One-To-Four Family - Mixed-Use Property Portfolio Segment [Member]
Loans sold			1
Proceeds			$ 405,000
Net gain (loss)			0
Net (charge-offs) recoveries			$ (1,000)