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Revenue - Schedule of Deferred Revenue Activity (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2018 USD ($)
Deferred revenue beginning balance	$ 3,564
Additions during the period	4,099
Recognized as revenue	(3,776)
Deferred revenue ending balance	3,887
September 30 2019 [Member]
Recognized as revenue	2,795
September 30 2020 [Member]
Recognized as revenue	774
September 30 2021 and Thereafter [Member]
Recognized as revenue	318
HW [Member]
Deferred revenue beginning balance	2,227
Additions during the period	1,886
Recognized as revenue	(1,786)
Deferred revenue ending balance	2,327
HW [Member] | September 30 2019 [Member]
Recognized as revenue	1,433
HW [Member] | September 30 2020 [Member]
Recognized as revenue	581
HW [Member] | September 30 2021 and Thereafter [Member]
Recognized as revenue	313
Monitoring [Member]
Deferred revenue beginning balance	1,337
Additions during the period	2,213
Recognized as revenue	(1,990)
Deferred revenue ending balance	1,560
Monitoring [Member] | September 30 2019 [Member]
Recognized as revenue	1,362
Monitoring [Member] | September 30 2020 [Member]
Recognized as revenue	193
Monitoring [Member] | September 30 2021 and Thereafter [Member]
Recognized as revenue	$ 5

X

- Definition

Additions during the period.

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+ Details

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X

- Definition

Amount of deferred revenue as of balance sheet date. Deferred revenue represents collections of cash or other assets related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.

+ References

No definition available.

+ Details

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- Definition

Amount of increase (decrease) in deferred revenue.

+ References

No definition available.

+ Details

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- Details

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- Details

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- Details

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