SIGNIFICANT CUSTOMERS AND CONCENTRATION OF CREDIT RISK	12 Months Ended
Dec. 31, 2021
SIGNIFICANT CUSTOMERS AND CONCENTRATION OF CREDIT RISK [Abstract]
SIGNIFICANT CUSTOMERS AND CONCENTRATION OF CREDIT RISK	9. SIGNIFICANT CUSTOMERS AND CONCENTRATION OF CREDIT RISK Royalty revenue from Econolite comprised 64% and 63% of revenue in the years ended December 31, 2021 and 2020, respectively. Accounts receivable from Econolite were $1.4 million and $1.8 million at December 31, 2021 and 2020, respectively. Major disruptions in the manufacturing and distribution of our products by Econolite or the inability of Econolite to make payments on its accounts receivable with us could have a material adverse effect on our business, financial condition and results of operations. At December 31, 2021, Econolite comprised 60% of our accounts receivable compared to 78% at December 31, 2020. Product revenue from four of the Company's major customers other than Econolite comprised 16% and 17% of revenue in the years ended December 31, 2021 and 2020, respectively. Accounts receivable from these customers were $352,000 and $274,000 at December 31, 2021 and 2020, respectively. Major disruptions in the distribution of our products by these customers or the inability to make payments on their accounts receivable with us could have a material adverse effect on our business, financial condition and results of operations. At December 31, 2021, the accounts receivable of these customers comprised more than 15% of accounts receivable.

SIGNIFICANT CUSTOMERS AND CONCENTRATION OF CREDIT RISK

12 Months Ended

Dec. 31, 2021

SIGNIFICANT CUSTOMERS AND CONCENTRATION OF CREDIT RISK [Abstract]

SIGNIFICANT CUSTOMERS AND CONCENTRATION OF CREDIT RISK

9. SIGNIFICANT CUSTOMERS AND CONCENTRATION OF CREDIT RISK

Royalty revenue from Econolite comprised 64% and 63% of revenue in the years ended December 31, 2021 and 2020, respectively. Accounts receivable from Econolite were $1.4 million and $1.8 million at December 31, 2021 and 2020, respectively. Major disruptions in the manufacturing and distribution of our products by Econolite or the inability of Econolite to make payments on its accounts receivable with us could have a material adverse effect on our business, financial condition and results of operations. At December 31, 2021, Econolite comprised 60% of our accounts receivable compared to 78% at December 31, 2020.

Product revenue from four of the Company's major customers other than Econolite comprised 16% and 17% of revenue in the years ended December 31, 2021 and 2020, respectively. Accounts receivable from these customers were $352,000 and $274,000 at December 31, 2021 and 2020, respectively. Major disruptions in the distribution of our products by these customers or the inability to make payments on their accounts receivable with us could have a material adverse effect on our business, financial condition and results of operations. At December 31, 2021, the accounts receivable of these customers comprised more than 15% of accounts receivable.