Note 5 - Leases - Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Operating lease cost	$ 589	$ 352	$ 1,120	$ 708
Finance lease interest cost	21	28	43	50
Finance lease amortization expense	163	159	326	311
Total lease cost	773	539	1,489	1,069
Operating lease cost	589	352	1,120	708
Finance lease interest cost	21	28	43	50
Finance lease amortization expense	163	159	326	311
Total lease cost	$ 773	$ 539	1,489	1,069
Cash paid for amounts included in the measurement of lease liabilities			821	215
Right-of-use assets obtained in exchange for lease obligations			$ 858	$ 0
Operating leases (Year)	9 years 8 months 12 days		9 years 8 months 12 days
Finance leases (Year)	2 years 9 months 18 days		2 years 9 months 18 days
Operating leases	7.80%		7.80%
Finance leases	5.10%		5.10%