Note 15 - Fair Value Measurements (Details Textual)	Dec. 31, 2018
Measurement Input, Discount Rate [Member]
Other Real Estate Owned, Measurement Input	0.06
Measurement Input, Appraised Value [Member] | Minimum [Member]
Other Real Estate Owned, Measurement Input	0.1
Measurement Input, Appraised Value [Member] | Maximum [Member]
Other Real Estate Owned, Measurement Input	0.2