Quarterly report pursuant to Section 13 or 15(d)

Note 5 - Equity - Restricted Stock Unit Activity (Details)

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Note 5 - Equity - Restricted Stock Unit Activity (Details) - Restricted Stock Units (RSUs) [Member] - $ / shares
9 Months Ended 12 Months Ended
Sep. 30, 2020
Dec. 31, 2019
Unvested Shares, number of shares (in shares) 316,907  
Unvested Shares, weighted average grant date fair value (in dollars per share) $ 1.31  
Unvested Shares, weighted average remaining contractual term (Year) 3 years 3 months 18 days 3 years 6 months
Granted, number of shares (in shares) 353,211  
Granted, weighted average grant date fair value (in dollars per share) $ 0.93  
Vested, number of shares (in shares) (79,227)  
Vested, weighted average grant date fair value (in dollars per share) $ 1.31  
Unvested Shares, number of shares (in shares) 590,891 316,907
Unvested Shares, weighted average grant date fair value (in dollars per share) $ 1.08 $ 1.31