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Government Grants (Tables)
 12 Months Ended
Dec. 31, 2018
Deferred Revenue Disclosure [Abstract]  
Government Grant
 
December 31, 2018

December 31, 2017

 
(in thousands)
Received
$
3,539

$
3,539

Less accumulated amortization
(2,792
)
(2,745
)
Foreign exchange translation adjustment
172

207

Total government grants
919

1,001

Less current portion
(42
)
(35
)
Non-current government grants
$
877

$
966