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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) | 12 Months Ended
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Nov. 30, 2018
Schedule of Depreciation Rates, Plant and Equipment [Table Text Block] |
| Computer equipment and software | 30% declining balance method
| Furniture and fixtures | 30% declining balance method
| Leasehold improvements | Straight line over period of lease
| Moulds | 20% straight line over 5 years

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- Definition Schedule of Depreciation Rate, Plant and Equipment + References No definition available. + Details
Name: | sdev_ScheduleOfDepreciationRatesPlantAndEquipmentTableTextBlock
Namespace Prefix: | sdev_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration