Note 15 - Fair Value Measurements - Level 3 Fair Value Measurements (Details) - Valuation, Market Approach [Member]		Dec. 31, 2018	Dec. 31, 2017
Measurement Input, Discount Rate [Member] | Minimum [Member]
Discount rate		0.055	0.055
Measurement Input, Discount Rate [Member] | Maximum [Member]
Discount rate		0.0725	0.1325
Measurement Input, Discount Rate [Member] | Weighted Average [Member]
Discount rate		(0.0605)	(0.0592)
Measurement Input, Cost to Sell [Member]
Level 3 Fair Value Measurements
Measurement Input, Cost to Sell [Member] | Minimum [Member]
Level 3 Fair Value Measurements	[1]	0	0.02
Measurement Input, Cost to Sell [Member] | Maximum [Member]
Level 3 Fair Value Measurements		0.06	0.0601
Measurement Input, Cost to Sell [Member] | Weighted Average [Member]
Level 3 Fair Value Measurements		0.0012	0.0472
Measurement Input, Discount for Lack of Marketability and Age of Appraisal [Member]
Level 3 Fair Value Measurements
Measurement Input, Discount for Lack of Marketability and Age of Appraisal [Member] | Minimum [Member]
Level 3 Fair Value Measurements		0	0.0168
Measurement Input, Discount for Lack of Marketability and Age of Appraisal [Member] | Maximum [Member]
Level 3 Fair Value Measurements		0.5005	0.6833
Measurement Input, Discount for Lack of Marketability and Age of Appraisal [Member] | Weighted Average [Member]
Level 3 Fair Value Measurements		0.0145	0.1107

[1] The Company markets other real estate owned both independently and with local realtors. Properties marketed by realtors are discounted by selling costs. Properties that the Company markets independently are not discounted by selling costs.