Annual report pursuant to Section 13 and 15(d)

Note 11 - Share-based Compensation - Summary of Restricted Share Activity, Excluding Company's Employee Stock Purchase Plan (Details)

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Note 11 - Share-based Compensation - Summary of Restricted Share Activity, Excluding Company's Employee Stock Purchase Plan (Details) - Restricted Stock [Member] - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Unvested, number of shares (in shares) 129,583 12,459
Unvested, weighted average grant date fair value (in dollars per share) $ 1.42 $ 2.61
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 26,000 125,000
Granted, weighted average grant date fair value (in dollars per share) $ 7.04 $ 1.37
Vested, number of shares (in shares) (58,314) (4,116)
Vested, weighted average grant date fair value (in dollars per share) $ 3.17 $ 2.60
Vested, aggregate fair value $ 712,969 $ 13,749
Vested shares forgone to satisfy minimum statutory withholding, number of shares (in shares) (71,269) (2,134)
Vested shares forgone to satisfy minimum statutory withholding, weighted average grant date fair value (in dollars per share) $ 3.17 $ 2.60
Vested shares forgone to satisfy minimum statutory withholding, aggregate fair value $ 422,779 $ 4,695
Forfeitures, number of shares (in shares) (1,626)
Forfeitures, weighted average grant date fair value (in dollars per share) $ 2.60
Unvested, number of shares (in shares) 26,000 129,583
Unvested, weighted average grant date fair value (in dollars per share) $ 7.04 $ 1.42