Annual report pursuant to Section 13 and 15(d)

Note 12 - Stock-based Compensation - Restricted Stock Units (Details)

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Note 12 - Stock-based Compensation - Restricted Stock Units (Details) - Restricted Stock Units (RSUs) [Member] - $ / shares
12 Months Ended
Jul. 02, 2020
Mar. 10, 2020
Jun. 03, 2019
Dec. 31, 2021
Dec. 31, 2020
Outstanding, beginning of period (in shares)       0 40,000
Outstanding, beginning of period, weighted average grant date fair value (in dollars per share)       $ 0 $ 2.00
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) 40,000 645,000 80,000 0 645,000
Granted, weighted average grant date fair value (in dollars per share)       $ 0 $ 7.32
Vested (in shares)       0 (685,000)
Vested, weighted average grant date fair value (in dollars per share)       $ 0 $ 7.01
Outstanding, end of period (in shares)       0 0
Outstanding, end of period, weighted average grant date fair value (in dollars per share)       $ 0 $ 0