Annual report pursuant to Section 13 and 15(d)

Note 5 - Employee Benefit Plans - Plan Changes in Fair Value of Plan Assets and Funded Status (Details)

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Note 5 - Employee Benefit Plans - Plan Changes in Fair Value of Plan Assets and Funded Status (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Change in projected benefits obligation:      
Projected benefit obligation at beginning of year $ 4,833 $ 4,884  
Service cost 147 153 $ 160
Interest cost 201 215 200
Actuarial (gain) loss 82 (203)  
Benefits paid, benefit obligation (231) (216)  
Projected benefit obligation at end of year 5,032 4,833 4,884
Fair value of plan assets at beginning of year 4,937 4,551  
Actual return on plan assets 552 413  
Contributions by employer 98 189  
Benefits paid, plan assets (231) (216)  
Fair value of plan assets at end of year 5,356 4,937 $ 4,551
Funded (unfunded) status at end of year $ 324 $ 104