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ACCOUNTS RECEIVABLE - NET | 12 Months Ended
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Dec. 31, 2021
Receivables [Abstract] |
ACCOUNTS RECEIVABLE - NET | NOTE 6. ACCOUNTS RECEIVABLE – NET Accounts receivable consist of the following:
|  | December 31 |
(in US$ thousands) |  | 2020 |  |  | 2021 |
Accounts receivable |  | $ | 276 |  |  | $ | 267 |
Less: Allowance for doubtful accounts |  |  | (1 | ) |  |  | (2 | )
|  | $ | 275 |  |  | $ | 265 |
The following is a summary of the changes in our Company’s allowance for doubtful accounts during the years ended December 31, 2019, 2020 and 2021:
(in US$ thousands) |  | 2019 |  |  | 2020 |  |  | 2021 |
Balance at beginning of year |  | $ | 5 |  |  | $ | 3 |  |  | $ | 1 |
Additions: Bad debt expense |  |  | 24 |  |  |  | 5 |  |  |  | 7 |
Less: Write-off |  |  | (26 | ) |  |  | (7 | ) |  |  | (6 | )
Translation adjustment |  |  | — |  |  |  | — |  |  |  | — |
Balance at end of year |  | $ | 3 |  |  | $ | 1 |  |  | $ | 2 |

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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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