Annual report pursuant to Section 13 and 15(d)

ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details)

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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
AOCI Attributable to Parent, Net of Tax [Roll Forward]      
Activity, net of tax $ (975) $ 1,128 $ (17)
Foreign Currency Translation Adjustments      
AOCI Attributable to Parent, Net of Tax [Roll Forward]      
Balance at the beginning of the period (10,134) (11,247) (11,231)
Activity, net of tax (973) 1,113 (16)
Balance at the end of the period (11,107) (10,134) (11,247)
Net Unrealized Gains (Losses) On Available-For-Sale Securities      
AOCI Attributable to Parent, Net of Tax [Roll Forward]      
Balance at the beginning of the period 2 (13) (12)
Activity, net of tax (2) 15 (1)
Balance at the end of the period 0 2 (13)
AOCI Attributable to Parent      
AOCI Attributable to Parent, Net of Tax [Roll Forward]      
Balance at the beginning of the period (10,132) (11,260) (11,243)
Activity, net of tax (975) 1,128 (17)
Balance at the end of the period $ (11,107) $ (10,132) $ (11,260)