v3.21.2

Accounts receivable, net (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2020
Accounts receivable, net |
Schedule of Accounts receivable, net |
|  | December 31,
|  | 2020 |  | 2019
Accounts receivable |  | $ | 8 |  | $ | 208
Allowance for doubtful accounts |  |  | — |  |  | (196)
|  | $ | 8 |  | $ | 12
Schedule of movements in allowance for doubtful accounts |
|  | 2020 |  | 2019
Balance at the beginning of the year |  | $ | 196 |  | $ | 196
Addition |  |  | — |  |  | —
Written-off |  |  | (196) |  |  | —
Balance at the end of the year |  | $ | — |  | $ | 196

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- Definition Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3,4) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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