Note 8 - Leases - Components of Lease Expense and Cash Flows from Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Amortization of right-of use assets, included in cost of goods sold	$ 97	$ 89
Interest on lease liabilities	21	11
Fixed leases cost	515	515
Variable lease cost	168	149
Short-term lease cost	85	61
Total lease cost	886	825
Operating cash flows from finance leases	21	11
Operating cash flows from operating leases	515	515
Financing cash flows from finance leases	$ 104	$ 96