XML 140 R120.htm IDEA: XBRL DOCUMENT
v3.21.1

Subsequent Events (Details) - USD ($) $ in Millions | Mar. 11, 2021 | Jan. 31, 2021
--- | --- | ---
Subsequent Event [Line Items] |  |
Remaining authorization under stock repurchase program |  | $ 39.2
Subsequent Event |  |
Subsequent Event [Line Items] |  |
Stock repurchase program, increase in authorized amount | $ 350.0 |
Remaining authorization under stock repurchase program | $ 389.2 |

X
- Definition Stock Repurchase Program, Increase In Authorized Amount + References No definition available. + Details
Name: | smtc_StockRepurchaseProgramIncreaseInAuthorizedAmount
Namespace Prefix: | smtc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount remaining of a stock repurchase plan authorized. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |