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Note 2 - Supplemental Balance Sheet Information - Goodwill Attributable to Reporting Units (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Goodwill	$ 780	$ 780
Facilities Segment [Member]
Goodwill	643	643
System Integration Services Segment [Member]
Goodwill	$ 137	$ 137

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(10)(1))
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-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
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Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 55
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-URI http://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766

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-Topic 350
-SubTopic 20
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