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Revenue - Schedule of Deferred Revenue Activity (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($)
Deferred revenue beginning balance	$ 4,495
Additions during the period	1,286
Recognized as revenue	(1,295)
Deferred revenue ending balance	4,486
March 31, 2021 [Member]
Recognized as revenue	3,093
March 31, 2022 [Member]
Recognized as revenue	1,108
March 31, 2023 and Thereafter [Member]
Recognized as revenue	285
Hardware [Member]
Deferred revenue beginning balance	2,663
Additions during the period	349
Recognized as revenue	(371)
Deferred revenue ending balance	2,641
Hardware [Member] | March 31, 2021 [Member]
Recognized as revenue	1,431
Hardware [Member] | March 31, 2022 [Member]
Recognized as revenue	928
Hardware [Member] | March 31, 2023 and Thereafter [Member]
Recognized as revenue	282
Monitoring [Member]
Deferred revenue beginning balance	1,832
Additions during the period	908
Recognized as revenue	(895)
Deferred revenue ending balance	1,845
Monitoring [Member] | March 31, 2021 [Member]
Recognized as revenue	1,662
Monitoring [Member] | March 31, 2022 [Member]
Recognized as revenue	180
Monitoring [Member] | March 31, 2023 and Thereafter [Member]
Recognized as revenue	$ 3

X

- Definition

Additions during the period.

+ References

No definition available.

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- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130531-203044

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130549-203045

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130532-203044

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- Definition

Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130549-203045

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