Note 11 - Fair Value of Financial Instruments - Financial Assets and Liabilities Reported Under the Fair Value Option (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Financial Assets at Fair Value Option		$ 14,300		$ 14,300		$ 13,800
Net loss from fair value adjustments		(2,124)	$ (170)	(6,160)	$ (537)
Collateralized Mortgage Backed Securities [Member]
Financial Assets at Fair Value Option		812		812		967
Net loss from fair value adjustments		0	(6)	2	(17)
Other Securities [Member]
Financial Assets at Fair Value Option		13,524		13,524		12,843
Net loss from fair value adjustments		107	(72)	470	(272)
Junior Subordinated Debentures [Member]
Financial Assets at Fair Value Option		43,910		43,910		$ 41,849
Net loss from fair value adjustments		(599)	(607)	(2,353)	(3,155)
Financial Assets and Liabilities, Excluding Interest Rate Caps / Swaps [Member]
Net loss from fair value adjustments	[1],[2]	$ (492)	$ (685)	$ (1,881)	$ (3,444)

[1] The net loss from fair value adjustments presented in the above table does not include net (losses) gains of ($1.6) million and $0.5 million for the three months ended September 30, 2019 and 2018, respectively, from the change in the fair value of interest rate swaps.

[2] The net loss from fair value adjustments presented in the above table does not include net (losses) gains of ($2.6) million and $2.9 million for the nine months ended September 30, 2019 and 2018, respectively, from the change in the fair value of interest rate swaps.