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Note 1 - Business Summary and Significant Accounting Policies (Details) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended		6 Months Ended
	Jun. 30, 2015 USD ($)	Jun. 30, 2015 USD ($) $ / shares	Jun. 30, 2014 USD ($) $ / shares	Jun. 30, 2015 USD ($) $ / shares	Jun. 30, 2014 USD ($) $ / shares	Dec. 31, 2014 USD ($)
Note 1 - Business Summary and Significant Accounting Policies (Details) [Line Items]
Change in Estimated Construction Gross Profit Before Tax		$ 0.9	$ (2.3)	$ (11.2)	$ 5.0
Estimated Change in Construction Gross Profit Per Diluted Share (in Dollars per share) | $ / shares		$ 0.04	$ 0.12	$ (0.59)	$ 0.27
Contract Receivable Discounted Percentage				4.25%
Interest Revenue (Expense), Net		$ 0.1	$ 0.1	$ 0.1	$ 0.2
Mortgage Outstanding, Number						1
Secured Long-term Debt, Noncurrent						$ 0.1
Repayments of Secured Debt	$ 0.1
Out of Period Adjustment		2.8		2.8
Notes Payable for Transportation and Construction Equipment [Member]
Note 1 - Business Summary and Significant Accounting Policies (Details) [Line Items]
Notes Payable, Noncurrent	$ 2.8	$ 2.8		$ 2.8
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum				3.12%
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum				6.29%
Minimum [Member]
Note 1 - Business Summary and Significant Accounting Policies (Details) [Line Items]
Ownership Interest In Joint Venture				50.00%
Revenue Recognition Percentage of Completion Range				12 months
Warranty Term				1 year
Minimum [Member] | Notes Payable for Transportation and Construction Equipment [Member]
Note 1 - Business Summary and Significant Accounting Policies (Details) [Line Items]
Debt Instrument, Term				3 years
Maximum [Member]
Note 1 - Business Summary and Significant Accounting Policies (Details) [Line Items]
Revenue Recognition Percentage of Completion Range				36 months
Warranty Term				2 years
Maximum [Member] | Notes Payable for Transportation and Construction Equipment [Member]
Note 1 - Business Summary and Significant Accounting Policies (Details) [Line Items]
Debt Instrument, Term				5 years

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Maximum contractual interest rate for funds borrowed, under the debt agreement.

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