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v3.20.1

Basis of Presentation - Supplementary cash flows information (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2020 | Mar. 31, 2019
Non-cash information: |  |
Right-of-use asset and lease liability recognized | $ 326 | $ 185
Additions to equipment in process included in accounts payable | 105 | 455
Restricted shares held for employee tax remittance included in accounts payable | $ 66 | $ 0

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