Annual report pursuant to Section 13 and 15(d)

Note 8 - Stock-based Incentive Plans - Non-vested Restricted Stock Unit Activity (Details)

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Note 8 - Stock-based Incentive Plans - Non-vested Restricted Stock Unit Activity (Details) - Restricted Stock Units (RSUs) [Member] - $ / shares
1 Months Ended 12 Months Ended
Feb. 29, 2020
Dec. 31, 2021
Non-vested restricted stock units, number of units (in shares)   382,000
Non-vested restricted stock units, weighted average grant date fair value (in dollars per share)   $ 4.68
Granted, number of units (in shares)   250,000
Granted, weighted average grant date fair value (in dollars per share) $ 2.60 $ 4.81
Vested, number of units (in shares)   (260,000)
Vested, weighted average grant date fair value (in dollars per share)   $ 4.07
Canceled, number of units (in shares)   (11,000)
Canceled, weighted average grant date fair value (in dollars per share)   $ 9.91
Non-vested restricted stock units, number of units (in shares)   361,000
Non-vested restricted stock units, weighted average grant date fair value (in dollars per share)   $ 5.05