Concentrations of Credit Risk	12 Months Ended
Dec. 31, 2021
Concentrations of Credit Risk
Concentrations of Credit Risk	4. Concentrations of Credit Risk Financial instruments that potentially subject the Company to concentrations of credit risk have consisted principally of cash and cash equivalent investments and trade receivables. The Company invests available cash in bank deposits, investment-grade securities, and short-term interest-producing investments, including government obligations and other money market instruments. At December 31, 2021 and 2020, the investments were bank deposits and overnight sweep accounts. The Company has adopted credit policies and standards to evaluate the risk associated with sales that require collateral, such as letters of credit or bank guarantees, whenever deemed necessary. Management believes that any risk of loss is significantly reduced due to the nature of the customers and distributors with which the Company does business. As of December 31, 2021and 2020, no customer accounted for more than 10% of the Company’s accounts receivable. For the years ended December 31, 2021, 2020, and 2019, no customer accounted for more than 10% of the Company’s revenues.

Concentrations of Credit Risk

12 Months Ended

Dec. 31, 2021

4. Concentrations of Credit Risk

Financial instruments that potentially subject the Company to concentrations of credit risk have consisted principally of cash and cash equivalent investments and trade receivables. The Company invests available cash in bank deposits, investment-grade securities, and short-term interest-producing investments, including government obligations and other money market instruments. At December 31, 2021 and 2020, the investments were bank deposits and overnight sweep accounts. The Company has adopted credit policies and standards to evaluate the risk associated with sales that require collateral, such as letters of credit or bank guarantees, whenever deemed necessary. Management believes that any risk of loss is significantly reduced due to the nature of the customers and distributors with which the Company does business.

As of December 31, 2021and 2020, no customer accounted for more than 10% of the Company’s accounts receivable. For the years ended December 31, 2021, 2020, and 2019, no customer accounted for more than 10% of the Company’s revenues.