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Convertible Notes - Schedule of Change in Principal Balance of Unsecured Convertible Note (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 USD ($)
Convertible Notes [Abstract] |
Issued | $ 18,000
Converted to common shares | $ (18,000)

X
- Definition Information about convertible notes + References No definition available. + Details
Name: | sndl_ConvertibleNotesAbstract
Namespace Prefix: | sndl_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Unsecured convertible notes issued. + References No definition available. + Details
Name: | sndl_UnsecuredConvertibleNotesIssued
Namespace Prefix: | sndl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Unsecured convertible notes principal balance converted to common shares. + References No definition available. + Details
Name: | sndl_UnsecuredConvertibleNotesPrincipalBalanceConvertedToCommonShares
Namespace Prefix: | sndl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration