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Restricted Cash
3 Months Ended
Mar. 31, 2019
Receivables [Abstract]  
Restricted Assets Disclosure [Text Block]
5.
Restricted Cash
 
The Company’s restricted cash consists of the following
:
 
 
 
March 31,

2019
 
 
December 31,

2018
 
Certificate of Deposit
 
$
1,008
 
 
$
1,005
 
 
The surety required a certificate of deposit to bond reclamation requirements of regulatory agencies. (see Note 9)