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Note 14 - Shares Outstanding and Earnings Per Share - Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Weighted average basic shares outstanding (in shares)	11,415	11,435	11,482	11,419
Assumed exercise of stock options and issuance of stock awards (in shares)
Weighted average diluted shares outstanding (in shares)	11,415	11,435	11,482	11,419
Net income	$ 2,081	$ 15,848	$ 4,155	$ 23,477
Basic earnings per share (in dollars per share)	$ 0.18	$ 1.39	$ 0.36	$ 2.06
Diluted earnings per share (in dollars per share)	$ 0.18	$ 1.39	$ 0.36	$ 2.06
Unvested RSUs (in shares)	167	63	167	63

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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