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Accounts Receivable, net | 12 Months Ended
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Dec. 31, 2020
Receivables [Abstract] |
Accounts Receivable, net | Accounts Receivable, net Accounts receivable at December 31, 2020 and 2019 were as follows (in thousands):
| December 31,
| 2020 |  | 2019
Trade accounts receivable, net of allowance for credit losses of $3,857 and $5,129, respectively | $ | 65,684 |  |  | $ | 101,718 |
Unbilled receivables | 26,215 |  |  | 43,422 |
Taxes receivable | 14,292 |  |  | 18,516 |
Affiliated (1) | 549 |  |  | 549 |
Other receivables | 3,867 |  |  | 2,489 |
Total accounts receivable, net | $ | 110,607 |  |  | $ | 166,694 |
(1)Amounts represent expenditures on behalf of non-consolidated affiliates. During the year ended December 31, 2020, $2.7 million was written off against the allowance for credit losses. As of December 31, 2020, 35% and 11% of our net trade receivables were from customers in the United States and Saudi Arabia, respectively. As of December 31, 2019, 42% of our net trade receivables were from customers in the United States. No other country accounted for more than 10% of our net trade receivables at these dates.

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- Definition The entire disclosure for claims held for amounts due a entity, excluding financing receivables. Examples include, but are not limited to, trade accounts receivables, notes receivables, loans receivables. Includes disclosure for allowance for credit losses. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -URI http://asc.fasb.org/subtopic&trid=2196772 + Details
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