Note 10 - Lease Obligations (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Operating Lease, Weighted Average Remaining Lease Term (Year)	9 years 2 months 12 days
Operating Lease, Weighted Average Discount Rate, Percent	11.20%
Operating Lease, Expense	$ 1,795	$ 1,754
Operating Lease, Right-of-Use Asset, Accumulated Amortization	2,626	2,641
Operating Lease, Payments	$ 1,615	$ 1,696
Minimum [Member]
Lessee, Operating Lease, Term of Contract (Year)	1 year
Maximum [Member]
Lessee, Operating Lease, Term of Contract (Year)	5 years