Quarterly report pursuant to Section 13 or 15(d)

Note 11 - Stock-based Compensation - Vesting Terms of Options Granted (Details)

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Note 11 - Stock-based Compensation - Vesting Terms of Options Granted (Details) - shares
shares in Thousands
 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Stock options granted in the period (in shares) 5,625 3,156
Options with Cliff Vesting After One Year Anniversary [Member]    
Stock options granted in the period (in shares) 0 0
Options with Three Year Vesting [Member]    
Stock options granted in the period (in shares) 425 430
Options with Four Year Vesting [Member]    
Stock options granted in the period (in shares) 5,200 2,726