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INVENTORY (Narrative) (Details)	6 Months Ended
	May 31, 2017 USD ($)
Inventory 1	$ 131,160
Inventory 2	$ 101,540

X

- 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

X

- Definition

Inventory 1

+ References

No definition available.

+ Details

Name:	sdev_InventoryZeroThreeFiveSixOneZerovkPqtlxlsgtFive
Namespace Prefix:	sdev_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration