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Stock based payments and director fees (Details 1) - Restricted stock - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares     8,000 8,000
Total cost of grant     $ 119 $ 119
Grant expense recognized $ 30 $ 2 $ 57
July 8, 2014 Directors Grants | Director        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares [1]     6,000 6,000
Per share value (in dollars per share) [1]     $ 15.00 $ 15.00
Total cost of grant [1]     $ 90 $ 90
Grant expense recognized [1] 23 $ 45
February 19, 2015 Director Grant | Director        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares [1]     2,000 2,000
Per share value (in dollars per share) [1]     $ 14.25 $ 14.25
Total cost of grant [1]     $ 29 $ 29
Grant expense recognized [1] $ 7 $ 2 $ 12
[1] Vesting period is one year from grant date.