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Note 1 - Summary of Business and Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2014
Disclosure Text Block [Abstract] |
Schedule of Property, Plant, and Equipment Useful Lives [Table Text Block] |
Buildings (years) |  | 39 |  |
Construction equipment (years) | 5 | - | 15 |
Land improvements (years) | 5 | - | 15 |
Office furniture and fixtures (years) | 3 | - | 10 |
Leasehold improvements (years or lease period, if shorter) | 3 | - | 10 |
Transportation equipment (years) |  | 5 |  |

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