Note 2 - Concentration of Credit Risk and Major Customers	6 Months Ended
Jun. 30, 2023
Notes to Financial Statements
Concentration Risk Disclosure [Text Block]	NOTE 2. CONCENTRATION OF CREDIT RISK AND MAJOR CUSTOMERS Financial instruments that potentially subject us to concentrations of credit risk consist principally of cash, accounts receivable, and contract assets. With regard to cash, we maintain our excess cash balances in checking accounts at primarily two financial institutions, one in the United States and one in China. The account in the United States may at times exceed federally insured limits. Of the $1,915 in cash and restricted cash at June 30, 2023, approximately $749 and $15 was held at banks located in China and Mexico, respectively. We grant credit to customers in the normal course of business and do not require collateral on our accounts receivable. We have certain customers whose revenue individually represented 10% or more of net sales, or whose accounts receivable balances individually represented 10% or more of gross accounts receivable. Two customers accounted for 39% of net sales for both the three and six months ended June 30, 2023. One customer accounted for 28% and 26% of net sales for the three and six months ended June 30, 2022, respectively. At June 30, 2023, two customers represented approximately 38% of our gross accounts receivable. At December 31, 2022, one customer represented approximately 21% of our gross accounts receivable. Contract assets for one customer accounted for 18% and 22% of gross contract assets at June 30, 2023 and December 31, 2022, respectively. Export sales represented approximately 3% for both the three and six months ended June 30, 2023. Export sales represented approximately 4% of net sales for both the three and six months ended June 30, 2022.

Note 2 - Concentration of Credit Risk and Major Customers

6 Months Ended

Jun. 30, 2023

Concentration Risk Disclosure [Text Block]

NOTE 2. CONCENTRATION OF CREDIT RISK AND MAJOR CUSTOMERS

Financial instruments that potentially subject us to concentrations of credit risk consist principally of cash, accounts receivable, and contract assets. With regard to cash, we maintain our excess cash balances in checking accounts at primarily two financial institutions, one in the United States and one in China. The account in the United States may at times exceed federally insured limits. Of the $1,915 in cash and restricted cash at June 30, 2023, approximately $749 and $15 was held at banks located in China and Mexico, respectively. We grant credit to customers in the normal course of business and do not require collateral on our accounts receivable.

We have certain customers whose revenue individually represented 10% or more of net sales, or whose accounts receivable balances individually represented 10% or more of gross accounts receivable. Two customers accounted for 39% of net sales for both the three and six months ended June 30, 2023. One customer accounted for 28% and 26% of net sales for the three and six months ended June 30, 2022, respectively.

At June 30, 2023, two customers represented approximately 38% of our gross accounts receivable. At December 31, 2022, one customer represented approximately 21% of our gross accounts receivable.

Contract assets for one customer accounted for 18% and 22% of gross contract assets at June 30, 2023 and December 31, 2022, respectively.

Export sales represented approximately 3% for both the three and six months ended June 30, 2023. Export sales represented approximately 4% of net sales for both the three and six months ended June 30, 2022.