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Note 8 - Accrued Retirement Benefits (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Pension Plan [Member]
Accrued retirement benefits	$ 6,271	$ 6,264
Supplemental Employee Retirement Plan [Member]
Accrued retirement benefits	4,173	4,154
Deferred Compensation Plan [Member]
Accrued retirement benefits	180	212
Accrued retirement benefits	10,624	10,630
Less current portion	378	378
Non-current portion of accrued retirement benefits	$ 10,246	$ 10,252

X

- Definition

This represents the entire liability recognized in the balance sheet that is associated with the defined benefit pension plans.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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- Definition

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