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OTHER INCOME (EXPENSE), NET
 6 Months Ended
Jun. 30, 2020
Other Income and Expenses [Abstract]  
OTHER INCOME (EXPENSE), NET OTHER INCOME (EXPENSE), NET
The principal components of other expense, net, are as follows (in thousands):
 
 Three Months Ended June 30,Six Months Ended June 30,
 2020201920202019
Interest and investment income$71  $156  $383  $163  
Income tax benefit (expense)91  (206) (115) (442) 
Other non-operating income—  —  2  —  
Total other income (expense), net$162  $(50) $270  $(279)