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Note 13 - Excess Tax Benefit Reclassification	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]	13. Excess Tax Benefit Reclassification Effective January 1, 2017, we adopted the provisions of FASB ASU No. 2016 - 09, “Compensation - Stock Compensation: Improvements to Employee Share-Based Payment Accounting” which simplifies several aspects of the accounting for share-based payment transactions. This standard changed the classification of excess tax benefits in the statements of cash flows. We retrospectively reclassified $235,000 and $432,000 of excess tax benefits for 2016 and 2015, respectively, from financing to operating activities within our 2017 consolidated statements of cash flows.

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- Definition

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-URI http://asc.fasb.org/topic&trid=2228938

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 50
-URI http://asc.fasb.org/subtopic&trid=2208855

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- References

No definition available.

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