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Note 2 - Income Per Share - Calculation of Net Income (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Numerator:
Net income	$ 1,548	$ 3,632	$ 1,510	$ 7,984
Denominator:
Basic weighted average shares outstanding (in shares)	18,281	18,189	18,269	18,168
Effect of dilutive securities:
Equivalent shares issuable upon conversion of unvested restricted stock (in shares)	78	86	78	76
Equivalent shares issuable upon conversion of unvested employee stock options (in shares)
Denominator for diluted earnings per share – adjusted weighted-average shares and assumed conversions (in shares)	18,359	18,275	18,347	18,244
Basic and diluted net income per share (in dollars per share)	$ 0.08	$ 0.20	$ 0.08	$ 0.44

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 contingently issuable shares. Contingently issuable shares are those shares that are issuable for little or no cash contingent on certain conditions being met.

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

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