Note 12 - Leases - Operating Lease Expense (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	$ 45	$ 47	$ 89	$ 103
Short-term lease cost	4	4	11	7
Total lease cost	$ 49	$ 51	$ 100	$ 110