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Supplemental Information for Statement of Cash Flows (Details Narrative) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Supplemental Information for Statement of Cash Flows        
Interest expense $ 0.2 $ 0.2 $ 0.4 $ 0.4