Note 20 - Commitments and Contingencies (Details Textual) $ in Millions	Jun. 30, 2020 USD ($)
Performance and Payment Bonds Outstanding Amount	$ 7.8
Estimated Cost to Complete Bonded Projects	0.5
Staffing Support Solutions LLC Matter [Member]
Loss Contingency Accrual, Ending Balance	$ 1.8

Amount of loss contingency liability.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant