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Accounts Receivable and Contract Assets (Tables) | 12 Months Ended
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Dec. 31, 2020
Accounts Receivable and Contract Assets [Abstract] |
Accounts Receivable and Contract Assets | Accounts receivable and contract assets are summarized in the following table:
|  | As of |  |  | As of |  |  |  |
|  | Dec. 31, 2020 |  |  | Dec. 31, 2019 |  |  | Change |
Accounts receivable – customers |  | $ | 5,633 |  |  | $ | 4,574 |  |  | $ | 1,059 |
Other receivables |  |  | 206 |  |  |  | 152 |  |  |  | 54 |
|  |  | 5,839 |  |  |  | 4,726 |  |  |  | 1,113 |
Less: allowance for doubtful accounts |  |  | (655 | ) |  |  | (305 | ) |  |  | (350 | )
Accounts receivable, net |  | $ | 5,184 |  |  | $ | 4,421 |  |  | $ | 763 |
Unbilled revenue |  | $ | 2,847 |  |  | $ | 2,276 |  |  | $ | 571 |

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- Definition Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130551-203045 + Details
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