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Supplemental disclosure of cash flow information (Tables)

12 Months Ended

Dec. 31, 2018

Cash Flow Statement [Abstract]

Non-cash financing and investing activities

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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Cash Flow Statement [Abstract]

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- Definition

Disclosure Of Cash Flow Statement, Investing And Financing Activities, Explanatory [Table Text Block]

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