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Note 5 - Sale of Business Component - Pre-tax Profit (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016
Pre-tax profit | $ 775 | $ (1,004)
Maryland-based Facilities Maintenance Business [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] |  |
Pre-tax profit |  | 812
Specific Customer Contract from Project Management Business [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] |  |
Pre-tax profit | $ 93 | $ 478

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- Definition Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(1)(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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