XML 54 R42.htm IDEA: XBRL DOCUMENT
v3.21.1

Accrued Expenses and Other Current Liabilities (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2020
Payables and Accruals [Abstract] |
Accrued Expenses and Other Current Liabilities |
|  | December 31 |
|  | 2019 |  |  | 2020 |
|  | US$ |  |  | US$ |
Wages and bonus |  |  | 26,643 |  |  |  | 35,027 |
Dividends |  |  | 36,919 |  |  |  | 36,764 |
Research and development payable |  |  | 5,693 |  |  |  | 6,722 |
License fees and royalties |  |  | 9,371 |  |  |  | 9,034 |
Professional fees |  |  | 1,772 |  |  |  | 1,869 |
Equipment |  |  | 557 |  |  |  | 2,145 |
Lease liabilities – current portion |  |  | 3,046 |  |  |  | 3,058 |
Others |  |  | 12,075 |  |  |  | 10,599 |
|  |  | 96,076 |  |  |  | 105,218 |

X
- Definition Tabular disclosure of the components of accrued expenses and other current liabilities. + References No definition available. + Details
Name: | simo_ScheduleOfAccruedExpensesAndOtherCurrentLiabilitiesTableTextBlock
Namespace Prefix: | simo_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_PayablesAndAccrualsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration