Note 10 - Leases - Leases Information (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019
Amortization of finance lease assets		$ 619	$ 560
Interest on finance lease liabilities		210	106
Total finance lease costs		829	666
Operating lease cost		2,939	3,017
Short-term lease cost		648	629
Variable lease cost	[1]	992	783
Sublease income		(183)	(165)
Total operating lease costs		4,396	4,264
Total lease cost		5,225	4,930
Operating cash outflow from operating leases		3,551	3,505
operating lease liabilities		$ 4,777	$ 17,613
Weighted-average remaining lease term-finance leases at end of period (in years) (Year)		1 year 255 days	1 year 36 days
Weighted-average remaining lease term-operating leases at end of period (in years) (Year)		9 years 292 days	10 years 292 days
Weighted-average discount rate-finance leases at end of period		8.30%	8.40%
Weighted-average discount rate-operating leases at end of period		8.70%	9.00%

[1] Variable lease costs consist primarily of taxes, insurance, utilities, and common area or other maintenance costs for the Company's leased facilities and equipment.