Note 15 - Fair Value Measurements and Fair Value of Financial Instruments (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Other Real Estate, Foreclosed Assets, and Repossessed Assets, Total	$ 4,918	$ 10,244
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	0.0020
Minimum [Member] | Measurement Input, Price Volatility [Member]
Warrants and Rights Outstanding, Measurement Input	0.1702
Minimum [Member] | Warrants Outstanding [Member]
Expected Life Of Warrants (Year)	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	0.0075
Maximum [Member] | Measurement Input, Price Volatility [Member]
Warrants and Rights Outstanding, Measurement Input	0.2787
Maximum [Member] | Warrants Outstanding [Member]
Expected Life Of Warrants (Year)	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	$ 4,900	$ 10,200