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Note 19 - Subsequent Event - Commitment to Purchase Concrete Company (Details Textual) - Subsequent Event [Member]	Mar. 08, 2017 USD ($)
New Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 85,000,000
Tealstone Construction [Member]
Business Combination, Consideration Transferred	85,000,000
Payments to Acquire Businesses, Gross	15,000,000
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable	1,882,058
Business Combination, Consideration Transferred, Liabilities Incurred	$ 55,000,000

X

- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477

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Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination.

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Amount of liabilities incurred by the acquirer as part of consideration transferred in a business combination.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Glossary Investing Activities
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