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INVENTORY (Narrative) (Details) | 3 Months Ended
--- | ---
Feb. 28, 2018 USD ($)
Inventory 1 | $ 124,535
Inventory 2 | 109,673
Inventory 3 | 66,006
Inventory 4 | $ 47,630

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- Definition Inventory 3 + References No definition available. + Details
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Namespace Prefix: | sdev_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

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- Definition Inventory 1 + References No definition available. + Details
Name: | sdev_InventoryZeroThreeEightNineEightZeroFourqqMtMdhTkHw
Namespace Prefix: | sdev_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition Inventory 2 + References No definition available. + Details
Name: | sdev_InventoryZeroThreeEightNineEightZerocrTXfQMswwGr
Namespace Prefix: | sdev_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition Inventory 4 + References No definition available. + Details
Name: | sdev_InventoryZeroThreeEightNineEightZerozRfFourqxWrJbFivet
Namespace Prefix: | sdev_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration