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INVENTORY (Narrative) (Details) | 6 Months Ended
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May 31, 2018 USD ($)
Inventory 1 | $ 115,770
Inventory 2 | 109,673
Inventory 3 | 63,381
Inventory 4 | $ 47,630

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- Definition Inventory 2 + 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 4 + References No definition available. + Details
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Namespace Prefix: | sdev_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition Inventory 1 + References No definition available. + Details
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Namespace Prefix: | sdev_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
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X
- Definition Inventory 3 + References No definition available. + Details
Name: | sdev_InventoryZeroThreeNineEightSixZerowGSevenLySevenhSixSixnFivey
Namespace Prefix: | sdev_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
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