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Note 12 - Net Income (Loss) Per Share Attributable to Sterling Common Stockholders (Tables) | 6 Months Ended
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Jun. 30, 2017
Notes Tables |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
|  | 2017 |  | 2016 |  | 2017 |  | 2016
Numerator: |  |  |  |  |  |  |  |
Net income (loss) attributable to Sterling common stockholders |  | $ | 3,662 |  |  | $ | 2,023 |  |  | $ | 1,405 |  |  | $ | (5,305 | )
Weighted average common shares outstanding — basic |  |  | 26,978 |  |  |  | 22,762 |  |  |  | 25,972 |  |  |  | 21,261 |
Shares for dilutive unvested stock and warrants |  |  | 358 |  |  |  | 197 |  |  |  | 437 |  |  |  | - |
Weighted average common shares outstanding and incremental shares assumed repurchased— diluted |  |  | 27,336 |  |  |  | 22,959 |  |  |  | 26,409 |  |  |  | 21,261 |
Basic income (loss) per share attributable to Sterling common stockholders |  | $ | 0.14 |  |  | $ | 0.09 |  |  | $ | 0.05 |  |  | $ | (0.25 | )
Diluted income (loss) per share attributable to Sterling common stockholders |  | $ | 0.13 |  |  | $ | 0.09 |  |  | $ | 0.05 |  |  | $ | (0.25 | )

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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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