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Supplemental disclosure of cash flow information
 12 Months Ended
Dec. 31, 2018
Cash Flow Statement [Abstract]  
Supplemental disclosure of cash flow information
Supplemental disclosure of cash flow information:
Non-cash financing and investing activities:
2018

 
2017

Compensatory shares
$
693

 
$
1,003

Constrained earn-out receivable on sale of assets
2,000

 
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