Note 8 - Debt - Long-term Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Total long term debt, net	$ 1,959	$ 2,539
Total long term debt, net	1,959	2,539
Mortgage Agreement [Member]
Total long term debt, net	1,906	2,469
Total long term debt, net	1,906	2,469
Equipment Notes, May 2021 [Member] | Notes Payable, Other Payables [Member]
Total long term debt, net	28	33
Total long term debt, net	28	33
Equipment Notes, December 2019 [Member] | Notes Payable, Other Payables [Member]
Total long term debt, net	22	26
Total long term debt, net	22	26
Equipment Notes, November 2018 [Member] | Notes Payable, Other Payables [Member]
Total long term debt, net	3	11
Total long term debt, net	$ 3	$ 11