Note 5 - Sale of Business Component - Pre-tax Profit (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Pre-tax profit	$ 2,463	$ 775
Maryland-based Facilities Maintenance Business [Member] \| Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
Pre-tax profit	1,332	1,122
Specific Customer Contract from Project Management Business [Member] \| Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
Pre-tax profit		$ 93

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.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-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

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