Note 2 - Concentration of Credit Risk and Major Customers (Details Textual) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Dec. 31, 2022
Excess Cash Balances, Number of High Credit Quality Financial Institutions			2
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents	$ 1,915	$ 1,175	$ 1,915	$ 1,175
Revenue Benchmark [Member] | Customer Concentration Risk [Member]
Concentration Risk Number of Customers	2	1	2	1
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Two Customers [Member]
Concentration Risk, Percentage	39.00%		39.00%
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | One Customer [Member]
Concentration Risk, Percentage		28.00%		26.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member]
Concentration Risk Number of Customers			2		1
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Two Customers [Member]
Concentration Risk, Percentage			38.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | One Customer [Member]
Concentration Risk, Percentage					21.00%
Contract Assets Benchmark [Member] | Customer Concentration Risk [Member]
Concentration Risk Number of Customers			1		1
Contract Assets Benchmark [Member] | Customer Concentration Risk [Member] | One Customer [Member]
Concentration Risk, Percentage			18.00%		22.00%
UNITED STATES
Excess Cash Balances, Number of High Credit Quality Financial Institutions			1
CHINA
Excess Cash Balances, Number of High Credit Quality Financial Institutions			1
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents	$ 749		$ 749
MEXICO
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents	$ 15		$ 15
Non-US [Member] | Revenue Benchmark [Member] | Geographic Concentration Risk [Member]
Concentration Risk, Percentage	3.00%	4.00%	3.00%	4.00%