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EXCLUSIVE SUPPLY AND PURCHASE AGREEMENTS (Narrative) (Details)	12 Months Ended
	Nov. 30, 2018
BIP
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Term of agreement	4 years
Additional term of agreement	1 year
Safariland, LLC
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Term of agreement	4 years
Additional term of agreement	1 year

X

- Definition

It represents additional term of agreement.

+ References

No definition available.

+ Details

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Namespace Prefix:	sdev_
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Balance Type:	na
Period Type:	duration

X

- Definition

It represents term of agreement.

+ References

No definition available.

+ Details

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

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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Period Type:	duration

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: