Note 5 - Summary of Weighted-average Assumptions Used to Determine Benefit Obligations and Costs (Details) |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
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| Weighted average assumptions used to determine benefit obligations as of December 31: | |||
| Discount rate | 4.25% | 4.50% | 4.00% |
| Rate of compensation increase | 7.29% | 7.29% | 7.29% |
| Weighted average assumptions used to determine benefit costs for the years ended December 31: | |||
| Discount rate | 4.50% | 4.00% | 5.00% |
| Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets | 7.00% | 7.00% | 7.00% |
| Rate of compensation increase | 7.29% | 7.29% | 7.29% |
| X | ||||||||||
- Definition The interest rate used to adjust for the time value of money for the plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Expected rate of compensation increases (for pay-related plans). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The interest rate used to adjust for the time value of money. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Expected rate of compensation increases (for pay-related plans). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- References No definition available.
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