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Restricted Cash (Tables)
3 Months Ended
Mar. 31, 2019
Disclosure of Restricted Cash [Abstract]  
Restrictions on Cash and Cash Equivalents [Table Text Block]
The Company’s restricted cash consists of the following
:
 
 
 
March 31,

2019
 
 
December 31,

2018
 
Certificate of Deposit
 
$
1,008
 
 
$
1,005