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SUPPLEMENTARY CASH FLOW INFORMATION (Details 1) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Interest paid $ 264 $ 618 $ 959
Taxes paid 279 2,373 4,991
Equipment acquired under finance leases and equipment loans $ 0 $ 122 $ 1,771