Note 2 - Concentration of Credit Risk and Major Customers (Details Textual) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Cash and Cash Equivalents, at Carrying Value	$ 699	$ 1,300	$ 699	$ 1,300	$ 1,027	[1]
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents	$ 1,121	$ 2,092	$ 1,121	$ 2,092
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	36.00%		38.00%
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			37.00%
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			29.00%		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	$ 640		$ 640
MEXICO
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents	$ 45		$ 45
Non-US [Member] | Revenue Benchmark [Member] | Geographic Concentration Risk [Member]
Concentration Risk, Percentage	3.00%	4.00%	3.00%	4.00%

[1] The balance sheet at December 31, 2022 has been derived from the audited financial statements at that date