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Note 10 - Basic Net Income (Loss) Per Share Attributable to Sterling Common Stockholders (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Net loss attributable to Sterling common stockholders	$ (7,328)	$ (16,992)
Weighted average common shares outstanding — basic (in shares)	19,760,000	18,902,000
Shares for dilutive unvested stock (in shares)
Weighted average common shares outstanding and incremental shares assumed repurchased— diluted (in shares)	19,760,221	18,901,739
Basic and diluted loss per share attributable to Sterling common stockholders (in dollars per share)	$ (0.37)	$ (0.90)

X

- Definition

The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Average number of shares or units issued and outstanding that are used in calculating basic and diluted earnings per share (EPS).

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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