Note 12 - Leases - Operating Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Operating lease cost	$ 44	$ 47	$ 133	$ 157
Short-term lease cost	4	5	15	12
Total lease cost	$ 48	$ 52	$ 148	$ 169