Annual reports filed by certain Canadian issuers pursuant to Section 15(d) and Rule 15d-4

Leases - Operating lease commitments (Details)

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Leases - Operating lease commitments (Details) - USD ($)
$ in Thousands
12 Months Ended
Jan. 01, 2019
Dec. 31, 2019
Dec. 31, 2018
Presentation of leases for lessee [abstract]      
Operating lease commitments     $ 800
Less: adjustment resulting from lease modification made in January 2019 $ (497)    
Less: operating costs not included in measurement of lease liability (287)    
Less: short-term leases recognized on a straight-line basis as expense (16) $ (67)  
Lease liabilities $ 0 $ 0