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Stock Compensation (Detail Textuals) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jul. 01, 2018
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock based compensation expense   $ 0 $ 1,000 $ 0 $ 2,000
Subsequent Event          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Special stock dividend, rate percent 4.00%        
Date of dividend payment Jul. 01, 2018