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Note 2 - Income Per Share (Details) - Calculation of Net Income (Loss) Per Share (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Numerator:
Net income (loss) (in Dollars)	$ 10,227us-gaap_NetIncomeLoss	$ (1,374)us-gaap_NetIncomeLoss
Denominator:
Denominator for basic earnings per share – weighted-average shares	18,145us-gaap_WeightedAverageNumberOfSharesOutstandingBasic	14,915us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Effect of dilutive securities:
Equivalent shares issuable upon conversion of unvested restricted stock	147us-gaap_IncrementalCommonSharesAttributableToEquityUnitPurchaseAgreements
Equivalent shares issuable upon conversion of unvested employee stock options	15us-gaap_IncrementalCommonSharesAttributableToContingentlyIssuableShares
Denominator for diluted earnings per share – adjusted weighted-average shares and assumed conversions	18,307us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding	14,915us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Basic and diluted income (loss) per share: (in Dollars per share)	$ 0.56us-gaap_EarningsPerShareBasicAndDiluted	$ (0.09)us-gaap_EarningsPerShareBasicAndDiluted

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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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-Publisher FASB

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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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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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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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