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SUPPLEMENTARY FINANCIAL STATEMENT INFORMATION (Accounts Payable and Accruals, Other) (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Accounts payable and accruals - other:    
Payroll and related expenses $ 1,381 $ 1,099
Interest payable 555 555
Provision for vacation 1,754 1,658
Accrued expenses 7,360 6,368
Royalties payable 757 369
Property and equipment suppliers 98 225
Accounts Payable, Current $ 11,905 $ 10,274