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PREPAID LICENSING AND ROYALTY FEES (Tables) | 12 Months Ended
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Dec. 31, 2021
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract] |
Summary of Changes to Prepaid Licensing and Royalty Fees | The following table summarizes changes to our Company’s prepaid licensing and royalty fees:
(in US$ thousands) |  | 2019 |  |  | 2020 |  |  | 2021 |
Balance at beginning of year |  | $ | 435 |  |  | $ | 44 |  |  | $ | 130 |
Addition |  |  | 205 |  |  |  | 340 |  |  |  | 98 |
Amortization and usage |  |  | (511 | ) |  |  | (254 | ) |  |  | (193 | )
Impairment charges |  |  | (85 | ) |  |  | — |  |  |  | — |
Balance at end of year |  | $ | 44 |  |  | $ | 130 |  |  | $ | 35 |

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- Definition Tabular disclosure of the amounts paid in advance for capitalized costs that will be expensed with the passage of time or the occurrence of a triggering event, and will be charged against earnings within one year or the normal operating cycle, if longer; the aggregate carrying amount of current assets, not separately presented elsewhere in the balance sheet; and other deferred costs. + 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 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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