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Note 5 - Construction Joint Ventures (Tables) | 12 Months Ended
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Dec. 31, 2016
Notes Tables |
Condensed Balance Sheet [Table Text Block] |
|  | As of December 31,
|  | 2016 |  | 2015
Total combined: |  |  |  |  |  |  |  |
Current assets |  | $ | 32,592 |  |  | $ | 17,312 |
Less current liabilities |  |  | (57,598 | ) |  |  | (49,371 | )
Net assets |  | $ | (25,006 | ) |  | $ | (32,059 | )
Backlog |  | $ | 107,333 |  |  | $ | 35,113 |
Sterling’s noncontrolling interest in backlog |  |  | 52,992 |  |  |  | 11,748 |
Sterling’s receivables from and equity in construction joint ventures |  |  | 7,130 |  |  |  | 12,930 |
Condensed Income Statement [Table Text Block] |
|  | Years Ended December 31,
|  | 2016 |  | 2015 |  | 2014
Total combined: |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  | $ | 62,440 |  |  | $ | 60,289 |  |  | $ | 51,015 |
Income before tax |  |  | 5,144 |  |  |  | 6,909 |  |  |  | 3,606 |
Sterling’s noncontrolling interest: |  |  |  |  |  |  |  |  |  |  |  |
Share of revenues |  | $ | 25,537 |  |  | $ | 23,778 |  |  | $ | 20,243 |
Share of income before tax |  |  | 1,980 |  |  |  | 2,502 |  |  |  | 2,111 |

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