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Schedule Of Derivative Liabilities At Fair Value (Details)	9 Months Ended
	Aug. 31, 2017 USD ($)
Convertible Debentures And Deferred Financing Costs Schedule Of Derivative Liabilities At Fair Value 1	$ 224,637

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Convertible Debentures And Deferred Financing Costs Schedule Of Derivative Liabilities At Fair Value 1

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