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Revenue - Schedule of Deferred Revenue Activity (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2019 USD ($)
Deferred revenue beginning balance	$ 4,061
Additions during the period	2,564
Recognized as revenue	(2,489)
Deferred revenue ending balance	4,136
June 30, 2020 [Member]
Recognized as revenue	2,691
June 30, 2021 [Member]
Recognized as revenue	1,134
June 30, 2022 and Thereafter [Member]
Recognized as revenue	311
HW [Member]
Deferred revenue beginning balance	2,432
Additions during the period	928
Recognized as revenue	(919)
Deferred revenue ending balance	2,441
HW [Member] | June 30, 2020 [Member]
Recognized as revenue	1,202
HW [Member] | June 30, 2021 [Member]
Recognized as revenue	933
HW [Member] | June 30, 2022 and Thereafter [Member]
Recognized as revenue	306
Monitoring [Member]
Deferred revenue beginning balance	1,629
Additions during the period	1,636
Recognized as revenue	(1,570)
Deferred revenue ending balance	1,695
Monitoring [Member] | June 30, 2020 [Member]
Recognized as revenue	1,489
Monitoring [Member] | June 30, 2021 [Member]
Recognized as revenue	201
Monitoring [Member] | June 30, 2022 and Thereafter [Member]
Recognized as revenue	$ 5

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=118944033&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=118956577&loc=SL49130549-203045

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=118944033&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=118956577&loc=SL49130549-203045

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