Note 10 - Shareholders' Equity - Stock-based Compensation Expense (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Total stock-based compensation expense	$ 420	$ 674
Per basic and diluted share (in dollars per share)	$ 0.02	$ 0.04
Cost of Sales [Member] | Edge to Cloud [Member]
Total stock-based compensation expense	$ 12	$ 35
Selling, General and Administrative Expenses [Member]
Total stock-based compensation expense	401	625
Research and Development Expense [Member]
Total stock-based compensation expense	$ 7	$ 14