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INTEREST AND OTHER EXPENSE (INCOME), NET (Tables)
 6 Months Ended
Jun. 30, 2018
Other Income and Expenses [Abstract]  
Schedule of interest expense (income) and other income, net
Interest and other expense (income), net, consisted of the following (in thousands):
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2018
 
2017
 
2018
 
2017
Interest income
$
(63
)
 
$
(43
)
 
$
(119
)
 
$
(81
)
Interest expense
77

 
51

 
142

 
75

Other expense (income), net
78

 
(126
)
 
65

 
(174
)
Total interest and other expense (income), net
$
92

 
$
(118
)
 
$
88

 
$
(180
)