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Segment Reporting and Geographic Information - Reconciliation of Segment Data to Consolidated Statement Balance Sheet (Details) - USD ($) $ in Thousands		Dec. 31, 2018	Dec. 31, 2017
Segment Reporting [Abstract]
Total assets for OmniMetrix subsidiary		$ 2,823	$ 2,931
Assets of corporate headquarters	[1]	1,096	6,291
Total consolidated assets		$ 3,919	$ 9,222
[1] Includes the investment in DSIT of $5,800 at December 31, 2017.

X

- Definition

Assets of corporate headquarters.

+ References

No definition available.

+ Details

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Balance Type:	debit
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X

- Definition

Assets of OmniMetrix headquarters.

+ References

No definition available.

+ Details

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X

- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(11))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(12))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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- References

No definition available.

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