Note 9 - Debt - Long-term Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Total long term debt, net	$ 2,292	$ 2,539
Total long term debt, net	2,292	2,539
Other		11
Mortgage Agreement [Member]
Total long term debt, net	2,211	2,469
Total long term debt, net	2,211	2,469
Progress Payment Agreement [Member]
Total long term debt, net	39	0
Total long term debt, net	39	0
Equipment Notes, May 2021 [Member] | Notes Payable, Other Payables [Member]
Total long term debt, net	24	33
Total long term debt, net	24	33
Equipment Notes, December 2019 [Member] | Notes Payable, Other Payables [Member]
Total long term debt, net	18	26
Total long term debt, net	$ 18	$ 26