Note 2 - Concentration of Credit Risk and Major Customers (Details Textual) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($)
Cash and Cash Equivalents, at Carrying Value	$ 4,028	$ 1,267	$ 960
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents	$ 4,028	$ 2,633
Revenue Benchmark [Member] | Customer Concentration Risk [Member]
Concentration Risk Number of Customers	2	1
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Two Customers [Member]
Concentration Risk, Percentage	35.00%
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | One Customer [Member]
Concentration Risk, Percentage		29.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member]
Concentration Risk Number of Customers	2	2
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		35.00%
Contract Assets Benchmark [Member] | Customer Concentration Risk [Member]
Concentration Risk Number of Customers	3	2
Contract Assets Benchmark [Member] | Customer Concentration Risk [Member] | One Customer [Member]
Concentration Risk, Percentage	41.00%	34.00%
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	$ 930
MEXICO
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents	$ 7
Non-US [Member] | Revenue Benchmark [Member] | Geographic Concentration Risk [Member]
Concentration Risk, Percentage	3.00%	4.00%