Note 9 - Leases (Details Textual) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Operating Lease, Liability, Total	$ 2,723	$ 3,700
Operating Lease, Liability, Noncurrent	1,599	2,380
Operating Lease, Right-of-Use Asset	3,826	5,445
Prepaid Rent	1,500
Other Current Liabilities [Member]
Operating Lease, Liability, Current	$ 1,124	1,346
Operating Lease Right of Use Assets [Member]
Prepaid Rent		$ 1,800
Minimum [Member]
Lessee, Operating Lease, Term of Contract (Year)	1 year
Maximum [Member]
Lessee, Operating Lease, Term of Contract (Year)	8 years