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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 1) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Foreign Currency Translation Adjustments, Beginning balance $ (5,489) $ (5,691)
Other comprehensive income before reclassifications, Foreign Currency Translation Adjustments 1,303 202
Amounts reclassified from accumulated other comprehensive loss, Foreign Currency Translation Adjustments 0 0
Net current period other comprehensive (loss) income, Foreign Currency Translation Adjustments 1,303 202
Foreign Currency Translation Adjustments, Ending balance (4,186) (5,489)
Defined Benefit Pension Items, Beginning balance (11,080) (12,776)
Other comprehensive (loss) income before reclassifications, Defined Benefit Pension Items (2,982) 765
Amounts reclassified from accumulated other comprehensive loss, Defined Benefit Pension Items 389 931
Net current period other comprehensive (loss) income, Defined Benefit Pension Items (2,593) 1,696
Defined Benefit Pension Items, Ending balance (13,673) (11,080)
Beginning balance (16,569) (18,467)
Other comprehensive (loss) income before reclassifications (1,679) 967
Amounts reclassified from accumulated other comprehensive loss 389 931
Net current period other comprehensive (loss) income (1,290) 1,898
Ending balance $ (17,859) $ (16,569)