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Concentrations of Credit and Other Risks
 12 Months Ended
Dec. 31, 2022
Risks and Uncertainties [Abstract]  
Concentrations of Credit and Other Risks Concentrations of Credit and Other Risks
The following customers accounted for 10% or more of our revenues for the periods presented:
Year Ended December 31,
202220212020
Quick Laser Technology Co., Ltd.
(1)
(1)
12%
Raytheon Technologies
(1)
(1)
12%
U.S. Government17%22%15%
(1)Represents less than 10% of total revenues.

Financial instruments that potentially expose us to concentrations of credit risk consist principally of receivables
from customers. As of December 31, 2022, and 2021, two customers accounted for a total of 29% and 33%, respectively, of net customer receivables. No other customers accounted for 10% or more of net customer receivables at either date.