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Note 12 - Net Income (Loss) Per Share Attributable to Sterling Common Stockholders (Tables) | 9 Months Ended
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Sep. 30, 2014
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2014 |  |  | 2013 |  |  | 2014 |  |  | 2013 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |
Net loss attributable to Sterling common stockholders |  | $ | (3,935 | ) |  | $ | (189 | ) |  | $ | (2,529 | ) |  | $ | (21,792 | )
Revaluation of the noncontrolling interest obligations reflected in retained earnings, net of tax |  |  | - |  |  |  | (766 | ) |  |  | - |  |  |  | (1,100 | )
|  | $ | (3,935 | ) |  | $ | (955 | ) |  | $ | (2,529 | ) |  | $ | (22,892 | )
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average common shares outstanding — basic |  |  | 18,809 |  |  |  | 16,652 |  |  |  | 17,814 |  |  |  | 16,626 |
Shares for dilutive unvested common stock and stock options |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Weighted average common shares outstanding and assumed conversions — diluted |  |  | 18,809 |  |  |  | 16,652 |  |  |  | 17,814 |  |  |  | 16,626 |
Basic loss per share attributable to Sterling common stockholders |  | $ | (0.21 | ) |  | $ | (0.06 | ) |  | $ | (0.14 | ) |  | $ | (1.38 | )
Diluted loss per share attributable to Sterling common stockholders |  | $ | (0.21 | ) |  | $ | (0.06 | ) |  | $ | (0.14 | ) |  | $ | (1.38 | )

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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