Note 6 - Shareholders' Equity - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Total stock-based compensation expense	$ 63	$ 40	$ 78	$ 115
Cost of Sales [Member] | Edge to Cloud [Member]
Total stock-based compensation expense	2	4	4	10
Selling, General and Administrative Expenses [Member]
Total stock-based compensation expense	60	34	72	100
Research and Development Expense [Member]
Total stock-based compensation expense	$ 1	$ 2	$ 2	$ 5