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J. OTHER INCOME AND EXPENSE (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Other income (expense)      
Foreign exchange transaction loss $ (617) $ (1,847) $ (1,002)
Government subsidy income 164 217 271
Other non-operating gain 32 117 44
Loss on disposal of assets (126) (78) (12)
Other income and expense, net $ (547) $ (1,591) $ (699)