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Concentration of Risk
6 Months Ended
Jun. 30, 2021
Concentration of Risk  
Concentration of Risk

Note 14.  Concentration of Risk

For the three months ended June 30, 2021, two customers accounted for 19.7% and 10.2% of total revenue, respectively. For the three months ended June 30, 2020, three customers accounted for 22.5%, 22.2% and 11.6% of total revenue, respectively.

For the six months ended June 30, 2021, one customer accounted for 24.4% of total revenue. For the six months ended June 30, 2020, three customers accounted for 19.7%, 18.5% and 16.2% of total revenue, respectively.

At June 30, 2021, two customers accounted for 11.7% and 10.0% of accounts receivable, respectively. At December 31, 2020, two customers accounted for 23.8% and 11.9% of accounts receivable, respectively.