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Schedule of Stockholders' Equity Note, Warrants or Rights, Weighted Average Remaining Contractual Term, Outstanding and Exercisable (Details) | 12 Months Ended
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Nov. 30, 2017 | Nov. 30, 2016
Class of Warrant or Right, Weighted Average Remaining Contractual Term | 4 years 8 months 5 days | 3 years 3 months
Class of Warrant or Right, Weighted Average Remaining Contractual Term | 4 years 8 months 5 days | 3 years 3 months

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- Definition Class of Warrant or Right, Weighted Average Remaining Contractual Term + References No definition available. + Details
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Namespace Prefix: | sdev_
Data Type: | xbrli:durationItemType
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- Definition Class of Warrant or Right, Weighted Average Remaining Contractual Term + References No definition available. + Details
Name: | sdev_ClassOfWarrantOrRightWeightedAverageRemainingContractualTerm
Namespace Prefix: | sdev_
Data Type: | xbrli:durationItemType
Balance Type: | na
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