Quarterly report pursuant to Section 13 or 15(d)

Note 10 - Share Capital (Details Textual)

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Note 10 - Share Capital (Details Textual) - The 2019 ATM Offering [Member] - USD ($)
shares in Thousands, $ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2021
Dec. 31, 2020
May 05, 2020
Stock Issuance Program, Authorized Amount     $ 75
Stock Issued During Period, Shares, New Issues (in shares) 0 0