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Note 2 - Income (Loss) Per Share - Calculation of Net Income (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Numerator:
Net income (loss)	$ 4,417	$ (39)
Denominator:
Basic weighted average shares outstanding (in shares)	18,331	18,256
Effect of dilutive securities:
Equivalent shares issuable upon conversion of unvested restricted shares (in shares)	75
Denominator for diluted earnings (loss) per share – adjusted weighted-average shares and assumed conversions (in shares)	18,406	18,256
Basic and diluted net income (loss) per share (in dollars per share)	$ 0.24	$ 0

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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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of equity unit purchase agreements using the treasury stock method.

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