Note 15 - Fair Value Measurements (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Other Real Estate, Foreclosed Assets, and Repossessed Assets, Total	$ 12,674	$ 9,442
Minimum [Member]
Estimated Sales Cost Applied To Collateral	3.00%
Minimum [Member] | Measurement Input, Risk Free Interest Rate [Member]
Warrants and Rights Outstanding, Measurement Input	0.0269
Minimum [Member] | Measurement Input, Price Volatility [Member]
Warrants and Rights Outstanding, Measurement Input	0.1301
Minimum [Member] | Warrants Outstanding [Member]
Expected Life Of Warrants	1 year
Maximum [Member]
Estimated Sales Cost Applied To Collateral	6.00%
Maximum [Member] | Measurement Input, Risk Free Interest Rate [Member]
Warrants and Rights Outstanding, Measurement Input	0.03
Maximum [Member] | Measurement Input, Price Volatility [Member]
Warrants and Rights Outstanding, Measurement Input	0.1804
Maximum [Member] | Warrants Outstanding [Member]
Expected Life Of Warrants	6 years
Accounts Receivable Collateral [Member]
Collateral Discount Rates	55.00%
Inventory Collateral [Member]
Collateral Discount Rates	65.00%
Net of Estimated Disposal Costs [Member]
Other Real Estate, Foreclosed Assets, and Repossessed Assets, Total	$ 12,700	$ 9,400